Large Truck Crash 
Causation Study 

Analytical 
User's Manual 


June 2006 
US Department of Transportation 


TABLE OF CONTENTS 


Introduction ..................................................................................................................................... 3


Programmers' Introduction to the LTCCS User's Manual and Data ................................................ 4


LTCCS Data Sets........................................................................................................................... 12


LTCCS Variable List....................................................................................................................... 17


Variable Definitions and Codes...................................................................................................... 37
Airbags Data Set...............................................................................................................38
Brakes Data Set................................................................................................................46
CargoShiftAssessments Data Set..................................................................................... 51
CDCCrush Data Set.......................................................................................................... 61
Crash Data Set.................................................................................................................. 71
CrashAssessment Data Set..............................................................................................78
CrashDiscussion Data Set ................................................................................................ 89
DMVViolation Data Set ..................................................................................................... 90
DriverAssessment Data Set..............................................................................................92
DriverDecisionAggression Data Set................................................................................ 115
DriverDrugs Data Set......................................................................................................127
DriverHealth Data Set ..................................................................................................... 129
DriverRecognitionDistraction Data Set ........................................................................... 140
DriverSleep Data Set ......................................................................................................149
Environment Data Set.....................................................................................................158
Events Data Set .............................................................................................................. 174
FactorAssessment Data Set ........................................................................................... 180
GeneralVehicle Data Set ................................................................................................ 204
HazMat Data Set.............................................................................................................253
HazMatInsp Data Set......................................................................................................255
Injuries Data Set..............................................................................................................257
JackknifeAssessments Data Set..................................................................................... 301
MCMISdriverData Data Set ............................................................................................ 307
MCMISviolation Data Set................................................................................................310
NonMotorists Data Set....................................................................................................325
Occupants Data Set........................................................................................................334
Overview Data Set .......................................................................................................... 358
PARViolations Data Set .................................................................................................. 404
SaferAuthorityStatus Data Set ........................................................................................ 407
SaferCarrier Data Set...................................................................................................... 408
SaferCrashSummary Data Set ....................................................................................... 414
SaferDriverCrashReport Data Set .................................................................................. 416
SaferDriverInspection Data Set ...................................................................................... 424
SaferDriverViolation Data Set ......................................................................................... 426
SaferInspectionsSummary Data Set............................................................................... 428
SaferInsurance Data Set................................................................................................. 432
SaferReview Data Set..................................................................................................... 435
SafeStat Data Set ...........................................................................................................437
TruckExterior Data Set.................................................................................................... 440
TruckInspection Data Set................................................................................................451
TruckUnits Data Set........................................................................................................466
VehicleEvents Data Set .................................................................................................. 478


LTCCS Analytical User's Manual • 30 June 2006 Table of Contents • i 


VehicleExterior Data Set.................................................................................................486
Index............................................................................................................................................ 500
Appendix A: LTCCS Sampling and Analytical Issues.................................................................509


LTCCS Analytical User's Manual • 30 June 2006 Table of Contents • ii 


Introduction 
The Motor Carrier Safety Improvement Act of 1999 (MCSIA), P.L. 106-159, mandated a study to 
determine the causes of, and contributing factors to, commercial motor vehicle crashes. The U.S. 
Department of Transportation’s (DOT) Federal Motor Carrier Safety Administration (FMCSA) and 
National Highway Traffic Safety Administration (NHTSA) conducted a multiyear, nationwide study 
of factors that contribute to truck crashes. The Large Truck Crash Causation Study’s (LTCCS) 
goal is to identify effective crash countermeasures. 

The LTCCS was conducted at 24 data collection sites in 17 States by researchers from NHTSA’s 
National Automotive Sampling System (NASS) and State truck inspectors. Crash data were 
coded in two NASS quality control Zone Centers and reviewed by FMCSA and NHTSA personnel 
and national truck crash experts. 

The LTCCS collected data on crashes from 2001 through 2003. An attempt was made to ensure 
that each crash involved at least one large truck with a gross vehicle weight rating of more than 
10,000 pounds, and resulted in at least one fatality or at least one incapacitating or non-
incapacitating but evident injury. Data were collected on up to 1,000 elements in each crash. To 
get the highest quality data possible, the onsite investigations began as soon as possible after the 
crash occurred. Data collection was performed at each crash site by a two-person team 
consisting of a trained researcher and a State truck inspector. Researchers collected data at 
crash scenes through driver, passenger, and witness interviews. 

Subsequent to the crash, each truck and truck driver were subjected to a thorough inspection. 
After leaving the crash scene, researchers collected additional interview data by telephone from 
motor carriers responsible for the trucks and surrogate drivers of trucks and other vehicles when 
the actual drivers could not be interviewed as a result of a fatal or serious injury. Researchers 
also reviewed police crash reports, hospitals records, and coroners’ reports. In addition, 
researchers often revisited the crash scene to make more accurate scene diagrams and search 
for additional data. 

Together the teams collected data on approximately 1,000 variables on each crash. Crash case 
data were provided to NHTSA crash experts for coding, difficult cases were reviewed by NHTSA 
and FMCSA headquarters staff, and finalized cases were sent to DOT’s Volpe National 
Transportation Systems Center for inclusion in the study’s electronic database. 

LTCCS Analytical User's Manual Introduction • 3 


Programmers' Introduction to the LTCCS User's Manual and Data 

Table Design 

There are 1070 crashes documented in the Large Truck Crash Causation Study (LTCCS) 
database. Each of these is assigned a unique CaseID. There were 2284 vehicles involved in the 
study crashes, each of which is assigned a VehicleNumber (from 1 to 30). Any vehicle in the 
database can be uniquely identified by CaseID and VehicleNumber. There are 3014 vehicle 
occupants and 53 non-motorists in the study. Each occupant is assigned an OccupantNumber 
(from 1 to 11). Each non-motorist is assigned a NonMotoristNumber (from 1 to 7). Occupants 
can be uniquely identified by CaseID, VehicleNumber, and OccupantNumber, and non-
motorists by CaseID and NonMotoristNumber. The database further identifies 2777 distinct 
events, each of which is one in a sequence of events which occur in the course of a crash. Each 
of these events can be uniquely identified by CaseID and EventSequence. 

When joining (i.e. merging) tables one must match those elements which uniquely identify 
records in the table, e.g. joining the VehicleEvents table with the GeneralVehicle table 
requires matching by common CaseID and VehicleNumber. 

There is one crash-level table, Crash and each row in this table corresponds to a single crash. 
This is the single most general, or "top-level" table. All other tables give finer levels of detail, with 
multiple rows per crash. The level of detail of the rows of a particular table can be determined by 
the introduction to the table given in the User's Manual. A description of the variables which must 
be taken together to uniquely identify each record are also given there. 

Variable Reference 

The LTCCS database (LTCCS DB) is released in three formats, SAS, MS-Excel, and plain text. 
Many of the values in the LTCCS DB are numeric codes corresponding to some meaningful value 
description. These values are captured by the SAS version of the LTCCS DB, but not the MS-
Excel or text versions. To assist users of the study data, a LTCCS DB Variable Reference table 
has been created for the Excel and text versions, which lists the LTCCS tables and variables with 
their code values and descriptions. By using this Variable Reference one may determine the 
meaning of a particular variable code value. This reference is automatically included in both the 
MS-Excel and text format download packages. 

Avoiding Difficulties 

It is recommended that the User's Manual be consulted carefully, rather than relying on intuitive 
interpretations of variable names. Most variables have integer values. In some cases these are 
literal values, e.g. counts. In others, these values are codes representing some other value which 
can be found in the variable reference. For example, the variable OCCFatality in dataset 
Crash does not represent the number of fatalities in the crash, but rather, whether there were 
any fatalities, as well as whether any fatalities were ruled due to disease rather than injury. 

Vehicle body type is identified by GVEBodyType in the GeneralVehicle dataset. By the 
methodology of the LTCCS large trucks are those with values for GVEBodyType = {60, 61, 62, 
63, 64, 66, 67, 68, 69, 70, 74, 78}. 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 4 


Examples 

All Trucks, Simple Count 

This algorithm obtains a simple, un-weighted count of the large trucks involved in the LTCCS. It 
demonstrates how to use the GVEBodyType variable to identify a particular vehicle as a large 
truck, and how to use the RATWeight variable to filter out invalid cases. Only cases with a 
positive RATWeight are valid for the purpose of the study. Invalid cases were included for 
purposes of qualitative analysis. 

1) Access GeneralVehicle table. 

2) Select only cases with values for GVEBodyType = {60, 61, 62, 63, 64, 66, 67, 68, 70, 74, 
78}. Depending on the programming environment used this may be more easily implemented by 
selecting cases where (GVEBodyType >= 60 & GVEBodyType <= 78 & GVEBodyType <> 65). 

3) Select only cases with values for RATWeight > 0. 
4) Count all remaining cases. This gives the unweighted number of large trucks in the LTCCS. 
5) Sum all values for RATWeight. This gives the weighted number of large trucks involved in 

serious crashes nation-wide. 

There are 1123 large trucks in the LTCCS. There are an estimated 141,200 large trucks involved 
in serious crashes nation-wide over the 33 month study period. 

Trucks by Vehicle Configuration 

The purpose of this table is to categorize large trucks involved in the LTCCS by vehicle 
configuration type, e.g. single-unit or tractor-trailer, and to give unweighted counts of the number 
of large trucks in each category. Single-unit vehicles are classified by their number of axles. 
Combination vehicles by the number of trailers being towed. 

1) Access TruckUnits table. 

2) Mark all vehicles with at least one value of AxlesUsed = {7, 8, 9}. 

3) Select only cases with values for RATWeight > 0. 

4) Create variable AxleCt. If AxlesNotUsed <= 3 then set AxleCt = AxlesUsed + 
AxlesNotUsed, else set AxleCt = AxlesUsed. Please note: values greater than three for 
AxlesNotUsed are not valid counts of axles. They indicate that the axles were not inspected, 
that this variable is not applicable, or that the count of axles not used is unknown. 

5) Count number of axles for each vehicle by summing the number of axles for each unit 
constituting that vehicle. 

6) Perform inner join (i.e. merge) of results with Overview table. 

7) Classify vehicles as follows: 

a. Vehicles with a single unit, a value of OVEConfiguration = 'R', and AxleCt = 2 are 
classified as "Single Unit - Two Axles", 
b. Vehicles with a single unit, a value of OVEConfiguration = 'R', and AxleCt > 2 are 
classified as "Single Unit - Three or More Axles", 
c. Vehicles with a single unit, a value of OVEConfiguration = 'R', and the number of 
axles is unknown (results from Step 2) are classified as "Single Unit - Axles Unknown", 
d. Vehicles with a value of OVEConfiguration = 'Not Insp' are classified as 
"Other/Unknown/Missing", 
e. Vehicles with a value of OVEConfiguration = 'T' are classified as "Combo Truck -
Truck Tractor (bobtail)", 
LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 5 


f. Vehicles with a value of OVEConfiguration = {'RF', 'RO'} are classified as "Combo 
Truck - Truck Pulling Trailer(s)", 
g. Vehicles with a value of OVEConfiguration = {'TO', 'TS', 'TSA'} are classified as 
"Combo Truck - Tractor pulling Trailer", 
h. Vehicles with a value of OVEConfiguration = {'TSAS', 'TSCS', 'TSF', 'TSXS'} are 
classified as "Combo Truck - Tractor pulling Two Trailers", 
i. Vehicles with a value of OVEConfiguration = {'ISS', 'ROO'} are classified as 
"Other/Unknown/Missing" (please note that the two cases included here, one instance of 
ISS and one instance of ROO may appear to fall under specific categories, but a review 
of the case discussion, CrashDiscussion.Discussion, shows them both to be 
unique and unusual cases and therefore valid instances of 'Other'). 
8) Sum vehicle counts in each classification and calculate percentage for each classification 
by dividing its count by the total number of large trucks (1123). 

Results are given in table 1 below. 

Table 1. Trucks by Vehicle Configuration 

Vehicle Configuration Unit Count Percentage 
Single Unit - Two Axles 124 11.0% 
Single Unit - Three Axles or more 157 14.0% 
Single Unit - Axles Unknown 2 0.2% 
Combo Truck - Truck Tractor – Bobtail 29 2.6% 
Combo Truck - Truck Tractor(s) 40 3.6% 
Combo Truck - Tractor pulling Trailer 697 62.1% 
Combo Truck - Tractor pulling Two Trailers 54 4.8% 
Other/Unknown/Missing 20 1.8% 
Total 1123 100.0% 

Trucks in Single-Vehicle Crashes by Critical Reason 

These crashes involved only a single vehicle. In every case that vehicle was a large truck; no 
passenger vehicles were involved in any of these crashes. The critical reason (ACRReason in 
table CrashAssessment, and OVEReason in table Overview) is the immediate reason for the 
critical event, which is the event that made the crash inevitable. 

The numbers in the second column represent the rounded estimates of how often these factors 
would be coded for all 141,200 estimated trucks involved in fatal and injury crashes that occurred 
during the 33-month period of the study. When the program is run, it will provide unrounded 
estimates. The numbers in this table have been rounded to the nearest 1,000 because they are 
National estimates and subject to sampling and nonsampling errors. The percentages in the last 
column are based on the unrounded estimates divided by 141,200 which is the unrounded 
estimate of trucks involved in fatal and injury crashes during the 33 months. 

1) Perform join (i.e. merge) of two tables, CrashAssessment and Crash using the CaseID 
variable. 

2) Select only cases with VehicleCount = 1. 

3) Select only cases with values for RATWeight > 0. Please note: this step is optional. 
Including this step will filter out large trucks which have zero weighting. There were 107 such 
cases, which were surveyed as part of the study but given a weight of zero because they did not 
meet the study criteria for one reason or another. These cases were still included in the study 
dataset, however, as additional qualitative data. 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 6 


4) For each value of ACRReason compute the sum of the values for RATWeight, i.e. group 
cases by values of ACRReason and take the weighted counts. Calculate percentage by dividing 
the weighted count by total weighted count. 

Results for step 4 are rounded and given in Table 2 below. 

5) Take results of 3) and take weighted counts of cases for each value of ReasonCat. 
Calculate percentage for reason category by dividing its count by the total number of large trucks. 

Results for step 5 are given in Table 3 below. 

Table 2. Trucks in Single-Vehicle Crashes by Critical Reason 

Critical Reason Number Percentage 
Too fast for curve/turn 9,000 22.3% 
Sleep, that is, actually asleep 5,000 12.8% 
Cargo shifted 3,000 6.6% 
Too fast for conditions to be able to respond... 2,000 6.4% 
Inattention (i.e., daydreaming) 2,000 5.9% 
Heart attack or other physical impairment of the ability... 2,000 5.9% 
Overcompensation 2,000 4.2% 
Poor directional control e.g., failing to control vehicle... 2,000 4.0% 
Critical event not coded to this vehicle 1,000 3.8% 
Inadequate surveillance (e.g., failed to look, looked but... 1,000 3.6% 
Type of driver error unknown 1,000 3.5% 
Internal distraction 1,000 3.4% 
Unknown recognition error 1,000 2.8% 
Aggressive driving behavior 1,000 2.1% 
Suspension failed 1,000 2.1% 
Degraded braking capability 1,000 2.0% 
Unknown critical non-performance * 1.3% 
Other decision error * 1.3% 
Tires/wheels failed * 1.0% 
Road design – other * 0.9% 
External distraction * 0.9% 
Brakes failed * 0.8% 
Slick roads (low friction road surface due to ice... * 0.6% 
Illegal maneuver * 0.4% 
Following too closely to respond to unexpected actions * 0.4% 
Other critical non-performance * 0.4% 
Wind gust * 0.3% 
Steering failed * 0.2% 
Misjudgment of gap or other's speed * 0.2% 
Unknown reason for critical event * 0.1% 
Road design - roadway geometry (e.g., ramp curvature) 0 0.0% 
Total 38,000 100.0% 

* Weighted numbers lower than 500 are rounded to zero. 
LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 7 


Table 3. Trucks in Single-Vehicle Crashes by Critical Reason Summary Category 

Reason Category Number Percentage 
Driver Decision Factor 13,000 33.1% 
Physical Driver Factor 8,000 20.3% 
Driver Recognition Factor 6,000 16.5% 
Vehicle Related Factor 5,000 12.7% 
Driver Performance Factor 4,000 11.6% 
No Driver Error 1,000 3.8% 
Environment - Highway 1,000 1.6% 
Environment - Weather * 0.3% 
Unknown Reason * 0.1% 
Total 38,000 100.0% 

* Weighted numbers lower than 500 are rounded to zero. 
One Truck/One Passenger Vehicle Crashes, Associated Factors 

One type of crash of particular interest to many investigators is the one truck/one passenger 
vehicle (PV) crash. These include any crash in which the first two vehicles to collide were a large 
truck and a passenger vehicle. This algorithm ignores vehicles involved in follow-on collisions. 
Only the first two vehicles to collide are of interest here. 

This algorithm describes compilation of a table showing the number of large trucks and 
passenger vehicles in one truck/one PV crashes by five associated crash factors, 1) prescription 
drug use, 2) traveling too fast for conditions, 3) braking system problem, 4) driver fatigue, and 5) 
weather. 

Two-vehicle crashes are included in this example only if one vehicle was a large truck, and the 
other a passenger vehicle. One example of a two-vehicle crash not included in this example is a 
two-vehicle crash involving two large trucks. Another example of a two-vehicle crash not included 
in this particular example would be a two-vehicle crash involving a large truck and a motorcycle. 
Additionally, multi-vehicle crashes are included in this example if and only if the first two vehicles 
to collide are a large truck and a passenger vehicle. In such a crash, only those two vehicles are 
included. Other vehicles involved in the pile-up are excluded from this particular example. The 
complexities of this example require that the vehicles to be used in the example be selected in 
two groups. The first group of vehicles are those involved in two-vehicle crashes. They are 
identified in steps 1 - 5. The second group of vehicles are those involved in multi-vehicle crashes. 
They are identified in steps 6 - 32. Step 33 merges these two groups of vehicles. 

The primary tasks involved in compiling this table are, 1) Classification of the vehicles involved in 
each event, 2) Identification of the two vehicles involved in the first collision, 3) Identification of 
one truck/one passenger vehicle crashes, and 4) Identification and summation of the associated 
factors relevant to all vehicles by vehicle type (i.e. truck versus passenger vehicle). 

1) Join (i.e. merge) the GeneralVehicle and Crash data sets. 

2) Select only cases for which VehicleCount = 2, TruckCount = 1, and CarCount = 1. 

3) Classify vehicles as follows: 

a. If 1 <= GVEBodyType <= 22, or 28 <= GVEBodyType <= 48, the vehicle is a Passenger 
Vehicle (PV), 
b. If 60 <= GVEBodyType <= 78 and GVEBodyType <> 65, the vehicle is a Truck, 
c. All other vehicles are classified as Other. 
4) Assign classifications to new variable called VehicleClass. 

5) Save results keeping only CaseID VehicleNumber VehicleClass and RATWeight. 

6) Join (i.e. merge) tables Events and GeneralVehicle by CaseID and VehicleNumber. 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 8 


7) Classify vehicles as follows: 

a. If 1 <= GVEBodyType <= 22, or 28 <= GVEBodyType <= 48, the vehicle is a Passenger 
Vehicle (PV), 
b. If 60 <= GVEBodyType <= 78 and GVEBodyType <> 65, the vehicle is a Truck, 
c. All other vehicles are classified as Other. 
8) Assign classifications to new variable called FirstVehicleClass. 
9) Rename VehicleNumber to FirstVehicleNumber. 
10) Save results. 
11) Access table Events. 
12) Select only cases for which EVEObjectContacted <> 0 and 
EVEObjectContacted <= 30.
13) Delete variable VehicleNumber. 
14) Rename EVEObjectContacted to VehicleNumber. 
15) Join (i.e. merge) results with table GeneralVehicle by CaseID and VehicleNumber. 
16) Classify vehicles as follows: 


a. If 1 <= GVEBodyType <= 22, or 28 <= GVEBodyType <= 48, the vehicle is a Passenger 
Vehicle (PV), 
b. If 60 <= GVEBodyType <= 78 and GVEBodyType <> 65, the vehicle is a Truck, 
c. All other vehicles are classified as Other. 
17) Assign classifications to new variable called SecondVehicleClass. 
18) Rename VehicleNumber to SecondVehicleNumber. 
19) Save results. 
20) Join (i.e. merge) results of step 10) and step 19) by CaseID and EventSequence. 
21) Select only cases with positive values for both FirstVehicleNumber and 
SecondVehicleNumber. 

22) Filter cases by selecting only the minimum value of EventSequence for each value of 
CaseID. 
23) Join (i.e. merge) results with Crash table. 
24) Select only cases with values for RATWeight > 0. Please note: this step is optional. Including 


this step will filter out large trucks which have zero weighting. There were 107 such cases, which 
were surveyed as part of the study but given a weight of zero because they did not meet the 
study criteria for one reason or another. These cases were still included in the study data set, 
however, as additional qualitative data. 


25) Select only cases for which VehicleCount > 2. 


26) Select only cases in which one vehicle is of type Truck and the other vehicle is of type 
Passenger Vehicle. 
27) Save results.
28) Rename variable FirstVehicleClass to VehicleClass and rename 


FirstVehicleNumber to VehicleNumber. 
29) Save results keeping only CaseID VehicleNumber VehicleClass and RATWeight. 
30) Access results from step 27). 
31) Rename variable SecondVehicleNumber to VehicleNumber and rename variable 


SecondVehicleClass to VehicleClass. 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 9 


32) Save results keeping only CaseID VehicleNumber VehicleClass and RATWeight. 

33) Concatenate results from steps 5), 29) and 32). 

34) Join (i.e. merge) results with DriverDecisionAggression table by CaseID and 
VehicleNumber. 

35) Create variable TooFast. If Speeding = 1 or Speeding = 2 or Speeding = 3, then set 
TooFast = RATWeight, else set TooFast = 0. 

36) Save Results. 

37) Access DriverDrugs table. Select only cases with DrugType = 1. This table consists of 
one row per drug used by the driver prior to the crash. For some cases there are multiple 
instances of prescription drug use by a driver. Eliminate repeat rows, i.e. there must be at most 
one row with value of DrugType = 1 per driver. 

38) Join (i.e. merge) results with results from step 36) by CaseID and VehicleNumber. 

39) Create variable PrescripDrug. If DrugType = 1, then set PrescripDrug = RATWeight, 
else set PrescripDrug = 0. 

40) Perform join (i.e. merge) of results with FactorAssessment table by CaseID and 
VehicleNumber. 

41) Create variable BrakeFactor. If BrakeFailure = 1 or BrakesOutOfAdjustment = 1 or 
BrakesInoperative = 1 or BrakesSystemDeficiency = 1, then set BrakeFactor = 
RATWeight, else set BrakeFactor = 0. 

42) Create variable WeatherFactor. If WeatherCount >= 1 and WeatherCount <= 6, then 
set WeatherFactor = RATWeight, else set WeatherFactor = 0. 

43) Join (i.e. merge) results with DriverAssessment table by CaseID and VehicleNumber. 

44) Create variable DriverFatigue. If Fatigue = 1, then set DriverFatigue = RATWeight, 
else set DriverFatigue = 0. 

45) Group cases by VehicleClass. The weighted number of large trucks or passenger vehicles 
in one truck/one passenger vehicle crashes that were speeding - or more specifically, traveling 
too fast for conditions - is the sum of the variable TooFast. Similarly, summing PrescripDrug 
yields the number of drivers taking prescription drugs. Summing BrakeFactor yields the 
number of vehicles with faulty brakes. Summing WeatherFactor yields the number of vehicles 
for which inclement weather was a factor (and as expected the number is the same for large 
trucks and passenger vehicles). Summing DriverFatigue yields the number of vehicles driven 
by fatigued drivers. Results are given below. 

46) Note that results are rounded to nearest 1000. Percentages are calculated by dividing the 
weighted count of vehicles per factor, by the total number of each type of vehicle involved in one 
truck/one PV crashes (i.e. 65460.17). 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 10 


Table 4. Vehicles Involved in One Truck/One Passenger Vehicle Crashes by Associated 
Factor. 

Truck PV 
Factor Number Percentage Number Percentage 
TooFast 10,000 15.3% 7,000 10.5% 
PrescripDrug 19,000 28.9% 23,000 34.8% 
BrakeFactor 18,000 27.0% 1,000 1.6% 
WeatherFactor 9,000 13.5% 9,000 13.5% 
DriverFatigue 5,000 7.4% 10,000 14.8% 

LTCCS Analytical User's ManualProgrammers' Introduction to the LTCCS User's Manual and Data • 11 


LTCCS Data Sets 
LTCCS data are available to the public in the form of 43 data sets. The data sets are available in 
SAS, Microsoft Excel, or delimited text versions. Ten of them are imported from SAFER 
(FMCSA's Safety and Fitness Electronic Records) and two are imported from MCMIS (Motor 
Carrier Management Information System) data. The rest contain researcher-collected data. 

• The Airbags data set contains all the airbag-related information for each of the vehicles 
involved in the crash. This material is provided as one record per airbag. 
• The Brakes data set contains information about the brake equipment on the vehicles. It is 
broken out by axle, which becomes part of the unique key of this data set. This material is 
provided as one record per axle for each truck involved in the crash for which brakes 
have been coded. 
• The CargoshiftAssessments data set contains detailed information on cargo shift events 
for all vehicles in the crash. Cargo shift is a pre-crash event. One record of this 
information is stored for each vehicle. 
• The CDCCrush data set contains detailed information about the crush profile for each 
impact, coded to a vehicle damaged in the crash. This material is provided as one record 
per unit/event/deformation location for any vehicle involved in the crash. 
• The Crash data set contains all details that are related to the crash itself, and not 
individual vehicles involved in the crash. There is one record per crash. The fields 
contained in this data set cover all the higher-level aspects of each case, such as highest 
injury severities. 
• The CrashAssessment data set contains assessment information for each vehicle and 
driver involved in the crash. One record of this information exists for each vehicle. 
• The CrashDiscussion data set contains the assessment summary for each vehicle and 
driver in the crash. This material is provided as one record per vehicle. 
• The DMVViolation data set contains information on the driver’s prior record of motor 
vehicle violations. One record is provided for each violation and is stored for each 
vehicle/driver where this information is available. 
• The DriverAssessment data set contains assessment information on the driver regarding 
level of attention, behavior, mental or emotional state prior to the crash. One record of 
this information exists for each vehicle/driver. 
• The DriverDecisionAggression data set contains a variety of data supporting the analyst’s 
assessment. It focuses particularly on the driver’s decisions and aggressive behavior. 
One record of this information exists for each vehicle/driver. 
• The DriverDrugs data set contains information supporting the analyst’s assessment on 
the driver’s use of any drug prior to the crash. One record of this information exists for 
each drug. 
• The DriverHealth data set contains a variety of data supporting the analyst’s assessment. 
It focuses particularly on the area of driver health. One record of this information exists 
for each vehicle/driver. 
• The DriverRecognitionDistraction data set contains a variety of data supporting the 
analyst’s assessment. It focuses particularly on the driver’s recognition and distraction. 
One record of this information exists for each vehicle/driver. 
LTCCS Analytical User's Manual LTCCS Data Sets • 12 


• The DriverSleep data set contains a variety of data supporting the analyst’s assessment. 
It focuses particularly on the area of driver sleep patterns and fatigue. One record of this 
information exists for each vehicle/driver. 
• The Environment data set contains information on the physical parameters of the 
roadway in the vicinity of the crash, any adverse weather conditions, how the driver was 
operating the vehicle and any distraction information if applicable. One record of this 
information is stored for each vehicle. 
• The Events data set contains all details that describe the events occurring during the 
crash. A record exists for each crash event. 
• The FactorAssessment data set contains a variety of data supporting the analyst’s 
assessment. It focuses particularly on roadway, environment, and vehicle-related factors. 
One record of this information exists for each vehicle. 
• The GeneralVehicle data set contains general information about the vehicle. This 
material is provided as one record per vehicle. 
• The HazMat data set contains information on hazardous material cargo for trucks 
carrying such material at the time of the crash. There is a record for each hazardous 
material. 
• The HazMatInsp data set contains information about hazardous material inspections for 
trucks carrying such material at the time of the crash. There is a record for each 
hazardous material inspection. 
• The Injuries data set contains all the injury information for occupants of vehicles involved 
in the crash. Each occupant injury is assigned a sequential injury number. This material 
is provided as one record per injury. 
• The IntvwCarrier data set contains information from the carrier on the carrier’s business 
operation and the truck driver. One record exists for each truck in the crash. 
• The IntvwDrAggresiveDriving data set contains information about driver behavior prior to 
the crash, based on the interviews. There may be multiple interviews per vehicle, which 
is reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrAttention data set contains information about driver attention and any 
distractions prior to the crash, based on interviews. There may be multiple interviews per 
vehicle, which is reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrCargoshift data set contains information about cargo shifting as a potential 
contributor to the crash, based on interviews. There may be multiple interviews per 
vehicle, which is reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrCondition data set contains information about the condition of the vehicle 
involved in the crash, based on interviews. There may be multiple interviews per vehicle, 
which is reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrDriver data set contains collected information from all the Interview 
documents focusing particularly on driver license status (CDL). There may be multiple 
interviews per vehicle, which is reflected in InterviewType. One record is stored for each 
interview. 
• The IntvwDrFatigue data set contains information about the driver and extent of fatigue, 
based on the interviews. There may be multiple interviews per vehicle, which is reflected 
in InterviewType. One record is stored for each interview. 
• The IntvwDrFire data set contains information from the driver regarding smoke or fire as 
a potential contributor to the crash, based on the interviews. There may be multiple 
LTCCS Analytical User's Manual LTCCS Data Sets • 13 


interviews per vehicle, which is reflected in InterviewType. One record is stored for each 
interview. 

• The IntvwDrHealth data set contains information on the general physical health of the 
driver prior to the crash, based on the interviews. There may be multiple interviews per 
vehicle, which is reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrJackknife data set contains detailed information about the jackknife event 
that took place prior to the crash, based on the interviews. There may be multiple 
interviews per vehicle, which is reflected in InterviewType. One record is stored for each 
interview. 
• The IntvwDrPerception data set contains detailed information about the driver’s 
perception of events that took place prior to the crash, based on the interviews. There 
may be multiple interviews per vehicle, which is reflected in InterviewType. One record is 
stored for each interview. 
• The IntvwDrRollover data set contains information on the rollover event, based on the 
interviews. There may be multiple interviews per vehicle, which is reflected in 
InterviewType. One record is stored for each interview. 
• The IntvwDrSleep data set contains information on the driver regarding the extent of 
sleep obtained before the crash, based on the interviews. There may be multiple 
interviews per vehicle, which is reflected in InterviewType. One record is stored for each 
interview. 
• The IntvwDrTrip data set contains information regarding the trip underway prior to the 
crash, based on the interviews. There may be multiple interviews per vehicle, which is 
reflected in InterviewType. One record is stored for each interview. 
• The IntvwDrViolations data set contains information on any driving or equipment 
violations in effect prior to, or issued after, the crash, based on the interviews. There may 
be multiple interviews per vehicle, which is reflected in InterviewType. One record is 
stored for each interview. 
• The JackknifeAssessments data set contains jackknife information on all vehicles. This 
material is provided as one record per vehicle. 
• The MCMISdriverData data set contains the number of prior crashes, vehicle inspections 
and inspection violations associated with this driver as reported by the Motor Carrier 
Management Information System. One record is stored for each vehicle/driver where this 
information is available. 
• The MCMISviolation data set contains information on the specific inspection violations 
issued to a driver for previous inspections as reported by the Motor Carrier Management 
Information System. One record of this information exists for each violation. 
• The NonMotorists data set contains information on nonmotorists who were involved in the 
crash. One record is stored for each nonmotorist. 
• The Occupants data set contains all the information related to each of the occupants in 
the vehicles involved in the crash. Not all occupants in the vehicle are researched in 
detail, so for many occupant records these values are “Unknown.” This material is 
provided as one record per occupant. 
• The Overview data set contains a summary of factors coded to each vehicle involved in 
the crash. Data from select assessment variables in other data sets are provided here. 
This facilitates analysis of factors that may have contributed to the crash. However, it is 
important to note that the presence of a particular factor does not necessarily indicate 
causation. There is one record in the data set for each vehicle. 
LTCCS Analytical User's Manual LTCCS Data Sets • 14 


• The PARViolations data set contains violations filed against the driver as a result of the 
crash and reported on the Police Accident Report. One record of this information is 
stored for each violation charged. 
• The SaferAuthorityStatus data set includes information on the insurance licensing 
authority for the driver’s carrier. This material is imported from the FMCSA Safety and 
Fitness Electronic Records (SAFER) database and is provided as one record per 
vehicle/driver for which this carrier information is available. 
• The SaferCarrier data set contains information on the operations of the driver’s carrier 
from the FMCSA SAFER database. This material is provided as one record per 
vehicle/driver for which this carrier information is available. 
• The SaferCrashSummary data set contains summary crash information for the driver’s 
carrier reported to the FMCSA for a period of 4 years. Each record represents one year 
of data and four records are stored for each vehicle/driver for which this carrier 
information is available. 
• The SaferDriverCrashReport data set contains historical information for previous crashes 
involving the driver from the FMCSA SAFER database. One record of this information is 
stored for each previous crash listed on inspection reports for the driver. This information 
is provided for each vehicle/driver where available. 
• The SaferDriverInspection data set contains inspection information for the driver while 
employed by this carrier from the FMCSA SAFER database. One record of this 
information is stored for each inspection report and is provided for each vehicle/driver 
where available. 
• The SaferDriverViolation data set includes information on any violation issued to the 
driver while employed by this carrier from the FMCSA SAFER database. One record of 
this information is stored for each violation listed on inspection reports for the driver. This 
information is provided for each vehicle/driver where available. 
• The SaferInspectionsSummary data set contains a summary of vehicle, driver, and 
hazardous material inspection information for the driver’s carrier reported to the FMCSA 
for the period of 2 years prior to the date of inquiry. This material is provided as one 
record per vehicle/driver for which this carrier information is available. 
• The SaferInsurance data set includes information on the type and status of insurance that 
the driver’s carrier holds from the FMCSA SAFER database. This material is provided as 
one record per vehicle/driver for which this carrier information is available. 
• The SaferReview data set contains the safety ratings of the driver’s carrier based on their 
compliance with FMCSA regulations from the FMCSA SAFER database. One record of 
this information is provided for each carrier review and reviews are stored for each 
vehicle/driver where this information is available. 
• The SafeStat data set contains safety statistics for the driver’s carrier from the FMCSA 
SAFER database. Scores are compiled for driver, vehicle, accident, and the safety 
management areas. One record of this information is provided for each SafeStat score 
assigned to a carrier. These scores are stored for each vehicle/driver where this 
information is available. 
• The TruckExterior data set contains information on each truck in the crash. Passenger 
vehicles involved in the crash are not included in this data set but instead are covered 
under VehicleExterior. This material is provided as one record per truck involved in the 
crash. 
• The TruckInspection data set combines information on Federal inspection violations. 
There may be more than one record per truck. Each record represents a violation. 
LTCCS Analytical User's Manual LTCCS Data Sets • 15 


• The TruckUnits data set contains detailed information about each unit involved in the 
crash. This includes both power units and trailers, where applicable, as indicated by the 
position field, which is part of the key of this data set. This material is provided as one 
record per truck unit. 
• The VehicleEvents data set contains information about events, such as safety equipment 
deployment and fires that occurred during and immediately after the crash. One record 
exists for each vehicle. 
• The VehicleExterior data set contains information on each passenger vehicle in the 
crash. Trucks are not included in this data set but instead are covered under 
TruckExterior. This material is provided as one record for each passenger vehicle 
involved in the crash. 
LTCCS Analytical User's Manual LTCCS Data Sets • 16 


LTCCS Variable List 
The following variables are contained in all of the data sets: 

CaseID 

The CaseID number is the identifier for the case. This variable is a unique number assigned to 
each crash. It appears on each data set and is used to merge the various information from the 
data sets together. 

PSU 

The PSU number refers to the geographic location of the Primary Sampling Unit investigating the 
case. There are 25 possible values ranging from 2 to 82. A PSU is either a large central city, a 
county surrounding a city, or a group of counties. This variable appears on each data set. 

PSUStrata 

PSUStrata refers to the number assigned to a crash during the first stage of sample selection. 
Analysts use the PSUStrata number and the SUDAAN statistical system to calculate variance. 
This variable appears on each data set. 

RATWeight 

The RATWeight is the multiplier used to produce national estimates from the data. This variable 
appears on each data set. 

The following variable is found in all vehicle-level the data sets: 

VehicleNumber 

The VehicleNumber is the number assigned to each vehicle in the case. This variable appears 
on each vehicle level data set and is used in conjunction with the CaseID variable to merge 
information from vehicle level data sets together. 

The following pages contain a list of all the variables in the LTCCS data sets. The list is 
organized alphabeticaly by data set. Within each data set, the variables are listed in the order 
they appear in the data set. The list displays the variable’s title, the variable’s name, and the 
page number where the variable can be found in the manual. 

LTCCS Analytical User's Manual LTCCS Variable List • 17 


VARIABLE LIST 

Airbags Data Set
Variable Title Variable Name Page


Air Bag Occupant Number 

Seat Row 1 

Seat Location 1 

Seat Row 2 

Seat Location 2 

Deployment Location Of Air Bag 

Air Bag Status 

Type Of Air Bag 

Redesigned Air Bag 

Air Bag Deployment 

Indications Of Air Bag Failure? 

Type Of Cutoff Switch 

Cutoff Switch Position Status 

Did Air Bag Module Cover Flaps Open At 
Designated Tear Points? 

Were The Cover Flaps Damaged? 

Was There Damage To The Air Bag? 

Source Of Air Bag Damage 

Had The Vehicle Been In Previous Crashes? 

Had Any Prior Maintenance/Service Been 
Performed On Air Bag System? 

CDC For Air Bag Deployment Impact 

Was The Air Bag In This Occupant’s Position 
Contacted By Another Occupant? 

AIROccupantNumber 38 
SeatRow1 38 
SeatLocation1 38 
SeatRow2 39 
SeatLocation2 39 
AirbagLocation 39 
AirbagStatus 40 
AirbagType 40 
Depowered 40 
Deployment 41 
AirbagFailure 41 
SwitchType 41 
SwitchStatus 42 

FlapsOpen 42 
FlapsDamaged 43 
AirbagDamage 43 
DamageSource 44 
PriorCrashes 44 

PriorMaintenance 44 
CDC 45 

ContactOther 45 

Brakes Data Set
Variable Title Variable Name Page


Axle 
Brake Type 
Brake Axle Position 
ABS Installed? 
ABS Functional? 
Adjustor Type 
Chamber Size 
Chamber Type 
Stroke Type 
Left Length 
Right Length 

Variable Title 

Axle 46 
BrakeType 46 
BRAPosition 46 
ABSInstalled 47 
ABSFunctional 47 
AdjustorType 47 
ChamberSize 48 
ChamberType 48 
StrokeType 49 
LeftLength 49 
RightLength 49 

CargoShiftAssessments Data Set 

Variable Name Page 

Type Of Cargo Shift Event ACSType 51 
Vehicle Location At Start Of Cargo Shift ACSLocation 51 
Movement Count MovementCount 52 

LTCCS Analytical User's Manual LTCCS Variable List • 18 


Cause Count 
Precrash Cargo Spillage? 
Driving At Constant Velocity 
Traversing A Curve 
Completing Turn 
Light Braking 
Accelerating 
Completing Avoidance Maneuver 
Other Event Circumstance 
Throttle Input Only 
Moderate Braking 
Heavy Braking 
Traversing A Straight Section 
Improper Loading (General Freight) 
Improper Loading (Bulk Freight) 

CauseCount 52 
ACSSpillage 52 
ACSConstant 53 
ACSCurve 53 
ACSTurn 53 
ACSLightBraking 54 
ACSAccelerating 54 
ACSAvoidance 54 
OtherMovement 55 
ACSDecelerating 55 
ACSModerateBraking 55 
ACSHeavyBraking 56 
ACSStraight 56 
ImproperGeneralLoading 56 
ImproperBulkLoading 57 

Inadequate Securement (Number Of Tie Downs)SparseTieDowns 57 
Inadequate Securement (Strength Of Tie 

 Downs) 
Other Source Of Solids Shift 
Less Than Full Load (Slosh) 
Baffle Failure 
Compartment Partition Failure 
Tank Failure 
Other Source Of Liquid Shift 
Other Cargo Shift Types 
Unknown Cause Of Cargo Shift 

Variable Title 

WeakTieDowns 57 
OtherSolids 58 
Sloshing 58 
BaffleFailure 58 
CompartmentFailure 58 
TankFailure 59 
OtherLiquids 59 
OtherCargos 59 
UnknownCause 60 

CDCCrush Data Set 

Variable Name Page 

Position Number 
Deformation Classification Type 
Object Contacted Category 
CDC Object Contacted 
Force Direction 
Clock Force 
Override/Underride 
Deformation Location 
Deformation – Longitudinal Or Lateral 
Deformation – Vertical Or Lateral 
Deformation Distribution 
Deformation Extent 
Deform Code 
Impact Number 
Direct Damage Location 
Field L Location 
Max Crush Location 
CDC Category 
CDC Width 

PositionNumber 61 
DCType 61 
ObjectContactClass 62 
CDCObjectContact 62 
ForceDirection 64 
ClockForce 64 
OverrideDesc 64 
DeformLocation 65 
DeformLong 65 
DeformVertical 66 
DeformDistribution 67 
DeformExtent 67 
DeformCode 68 
ImpactNumber 68 
DamageLocation 68 
FieldLocation 69 
MaxCrushLocation 69 
CDCCategory 69 
CDCWidth 69 

LTCCS Analytical User's Manual LTCCS Variable List • 19 


Crash Data Set 

Variable Title Variable Name Page 

Crash Date 
Time Of Crash 
Total Number Of Vehicles In Crash 
Truck Count 
Car Count 
Nonmotorist Count 
Crash Summary 
Injury Crash Severity Code – Police 
Injury Crash Severity Code – Researched 
Case Summary 
Collision Type 
Medical Treatment 
Occupant Fatality 
Alcohol Involvement? 
Drug Involvement? 

CrashDate 71 
CrashTime 71 
VehicleCount 71 
TruckCount 72 
CARCount 72 
NonMotoristCount 72 
CrashType 72 
CrashPARSevCode 73 
CrashRESSevCode 73 
Summary 74 
CollisionType 75 
Treatment 76 
OCCFatality 77 
CRAAlcohol 77 
AnyDrugsCrash 77 

CrashAssessment Data Set
Variable Title Variable Name Page


Pre-Event Movement 
Critical Precrash Event 
Critical Precrash Event Categories 
Critical Reason For The Critical Event 
Critical Reason Categories 
Attempted Avoidance Maneuver 
Pre-Impact Stability 
Pre-Impact Location 
Right-Of-Way? 
Crash Type 
Crash Configuration 
Jackknife 
Cargo Shift 

PreEventMovement 78 
ACRCriticalEvent 79 
CriticalEventCat 80 
ACRReason 81 
ReasonCat 82 
ACRAvoidance 83 
ACRStability 84 
ACRLocation 84 
ACRRightOfWay 84 
CrashCode 85 
AccidentCat 87 
ACRJackknife 88 
ACRCargoshift 88 

CrashDiscussion Data Set 

Variable Title Variable Name Page 

Case Summary Discussion 89 

DMVViolation Data Set 

Variable Title Variable Name Page 

License State LicState 90 
Citation Date CitDate 90 
Conviction Date ConvDate 90 
ACD Code ACDcode 91 
ACD Detail ACDdetail 91 
Violation Description ViolDescription 91 

LTCCS Analytical User's Manual LTCCS Variable List • 20 


DriverAssessment Data Set
Variable Title Variable Name Page


Was This Driver’s Sight Line To The Other 
Vehicle Clear? 

Was This Driver’s View Of The Other Vehicle 
Obscured? 

Was This Driver Required To Stop Prior To 
Crash Occurrence? 

Period Of Time Stopped Prior To Entering 
Intersection And/Or Initiating Turn 

SightLine 92 
Obscured 92 
StopRequired 93 
TimeStopped 93 

After Checking For Traffic, Did This Driver Focus 

On Intended Turn Destination Or Other 
Location? 

Sleep Related To Work Schedule 

Sleep Related To Social Schedule 

Sleep Related To Personal Problems 

Sleep Related To Family Problems 

Sleep Related To Illness 

No Driver Present 

Sleep Related To Other Factor 

Sleep Related To Unknown Factor 

Alcohol Use 

Alcohol Test 

Source Of BAC Test Result 

Time Delay (Between Crash And BAC Test) 

Illegal Drug Use 

Driver Fatigue 

Was The Driver Upset Prior To The Crash? 

Was The Driver In A Hurry Prior To Crash? 

Other Emotional Factors 

Vehicle Familiarity 

Roadway Familiarity 

Work Pressure Factors Count 

Learning New Position 

Production/Shipping Deadlines 

Work Schedule Pressure 

Additional Production/Sales Requirements 

Forced To Accept Loads With Little Or No 
Advance Notice 

Demoted 

Self Induced Work Pressure - Illegal 

Self Induced Work Pressure - Other 

Other Work Pressure 

Comfort Count 

Uncomfortable With Surrounding Traffic 
Densities 

Uncomfortable With General Traffic Speeds 

Uncomfortable with General Traffic Flow 

Uncomfortable With Some Aspect Of 
Vehicle/Load 

Other Comfort Factor 

Under Pressure To Accept Loads 

Work Fatigue Factors Count 

Scheduled Loads Require Extended Hours 

Scheduled Trips Require Rotating Shift 

Focused 94 
ADRWorkSchedule 94 
SocialSchedule 95 
PersonalProblems 95 
FamilyProblems 96 
Illness 96 
NoDriverPresent 96 
ADROtherFactor 97 
UnknownFactor 97 
AlcoholUse 97 
AlcoholTest 98 
TestSource 98 
TestDelay 99 
DrugTest 99 
Fatigue 100 
Upset 100 
Hurrying 101 
Emotional 101 
KnewVehicle 102 
KnewRoad 102 
WorkPressureCount 103 
NewPosition 103 
ShippingDeadline 104 
EXPWorkSchedule 104 
Quotas 104 

ExtraLoads 105 
Demoted 105 
SelfInducedIllegal 105 
SelfInducedOther 106 
OtherPressure 106 
ComfortCount 107 

TrafficDensity 107 
TrafficSpeed 107 
ADRTrafficFlow 108 

VehicleLoad 108 
OtherComfortFactor 108 
LoadPressure 109 
WorkFatigueCount 109 
ScheduledExtensions 110 
RotatingShift 110 

LTCCS Analytical User's Manual LTCCS Variable List • 21 


Unscheduled Loads Require Extended Hours 
Not Applicable – Under Pressure To Operate 
Even If Fatigued 
Other Fatigue-Related Factors 
Other Pressure Count 
Required To Accept Short Notice Trips 
Required To Fill In For Other Drivers 
Required To Complete Unpaid Loading 
Variable Compensation Package 
Not Applicable – Other Relation Factor Types 
Other Carrier Relation Factors 

UnscheduledExtensions 110 

NoApplicableFatigue 111 
OtherFatigue 111 
OtherPressureCount 112 
ShortNoticeTrips 112 
FillInTrips 112 
UnpaidLoading 113 
VariableCompensation 113 
NoApplicableRelations 113 
OtherRelations 114 

DriverDecisionAggression Data Set 

Variable Title Variable Name Page 

Traveling Too Fast For Conditions Speeding 115 
Following Too Closely Tailgating 115 
Misjudgment Of Gap Distance Or Velocity Of 

Other Vehicle Misjudgment 116 
Other Vehicle Approaching From This Driver’s Approach 116 
Police Reported Travel Speed ADATravelSpeed 117 
Posted Speed Limit ADAPostedSpeed 117 
False Assumption Of Other Road User’s Actions Assumption 118 
Inadequate Evasive Action Evasion 118 
Other Decision Factors ADAOtherFactor 119 
Illegal Maneuver Count ManeuverCount 119 
Crossed Full Barrier Lines While Passing CrossedLine 120 
Passed On Right (Drive Off Pavement To Pass) Undertaking 120 

Turned From Wrong Lane 
Initiated Illegal U-Turn 
Failed To Stop For TCD 
Drove Wrong Way On One-Way Road 
Other Illegal Maneuver 
Aggression Count 
Speeding 
Tailgating 
Weaving In And Out Of Traffic 
Intentional Violation Of Traffic Control Devices 
Accelerated Rapidly/Stopped Suddenly 
Honking Horn 
Flashing Lights 
Obscene Gestures 
Obstructing The Path Of Others 
Other Aggressive Behavior 
Reasons For Aggressive Driving Behavior 

WrongTurnLane 120 
IllegalUTurn 120 
RanLights 121 
WrongWay 121 
OtherManeuver 122 
AggressionCount 122 
SpeedingBehavior 122 
TailgatingBehavior 123 
Weaving 123 
LightViolations 124 
RapidAcceleration 124 
Honking 124 
Flashing 125 
ObsceneGestures 125 
BlockingOthers 125 
OtherAggression 126 
AggressionReason 126 

DriverDrugs Data Set 

Variable Title Variable Name Page 

Drug Name DrugName 127 
Drug Type DrugType 127 
Driver Reported DriverReported 127 
Drug Test Results TestResult 128 

LTCCS Analytical User's Manual LTCCS Variable List • 22 


DriverHealth Data Set 

Variable Title Variable Name Page 

Corrected Vision Level 
Number Of Illness Factors 
Heart Attack 
Seizure (Epilepsy Related) 
Seizure (Other Source) 
Blackout (Diabetes Related) 
Blackout (Other Source) 
Severe Cold/Flu Symptoms 
Other Illness 
Normal Vision 
Legal Blindness 
Myopic (Near-sighted) Condition 
Hyperopic (Far-sighted) Condition 
Glaucoma 
Color Blind 
Astigmatism 
Other Vision Problem 
Unknown Vision Problem 
Number Of Other Physical Factors 
No Other Physical Factors 
Hearing Impairment 
Prosthesis 
Paraplegia 
Strenuous Recreation Activities 
Strenuous Non-Work Activities 
Sleep Apnea 
Other Physical Factor 

ADHCorrectedVision 129 
IllnessFactorCount 129 
HeartAttack 130 
EpilepticSeizure 130 
OtherSeizure 130 
DiabeticBlackout 131 
OtherBlackout 131 
ColdFlu 131 
OtherIllness 132 
NormalVision 132 
LegallyBlind 132 
Myopic 133 
Hyperopic 133 
Glaucoma 134 
ColorBlind 134 
Astigmatic 135 
OtherVision 135 
UnknownVision 135 
OtherFactorCount 136 
NoFactors 136 
HearingImpairment 137 
Prosthesis 137 
Paraplegia 137 
StrenuousRecreation 138 
StrenuousNonWork 138 
SleepApnea 139 
OtherFactorPhysical 139 

DriverRecognitionDistraction Data Set
Variable Title Variable Name Page


Inattention 

Conversation 

Nature Of Discussion 

Nature Of Relationship Between Driver And 
Person Conversing With 

Location Of Exterior Factor 

Inadequate Surveillance 

Tracking Of Rear Exterior Factor 

Other Recognition Factors 

Interior Distraction Count 

Looking At Movement/Actions Of Other 
Occupants 

Dialing/Hanging Up Phone 

Adjusting Radio/CD Player 

Adjusting Other Vehicle Controls 

Retrieving Object From Floor And/Or Seat 

Retrieving Object From Other Location 

Other Internal Distraction 

Exterior Distraction Count 

Looking At Previous Crash 

Looking At ApproachingTraffic 

Inattention 140 
Conversation 140 
Subject 141 

Conversant 141 
OutsideLocation 142 
ADDSurveillance 142 
Tracking 143 
ADDRecognition 143 
InteriorDistractionCount 143 

OccupantMovement 144 
ADDDialingPhone 144 
ADDAdjustingRadio 144 
OtherControls 145 
FloorRetrieval 145 
OtherRetrieval 145 
OtherInternal 146 
ExteriorDistractionCount 146 
ADDPreviousCrash 146 
ApproachingTraffic 147 

LTCCS Analytical User's Manual LTCCS Variable List • 23 


Looking For Street Address 
Looking At Outside Person 
Looking At Building 
Unspecified Outside Focus 
Other External Distraction 

StreetAddress 147 
ExternalPerson 147 
Building 148 
UnspecifiedExternal 148 
OtherExternal 148 

DriverSleep Data Set
Variable Title Variable Name Page


Hours Of Last Sleep 

Start Time Of Last Sleep Interval 

End Of Last Sleep Interval 

Hours Since Last Sleep 

If Hours Of Sleep Were Less Than 4 Hours, 
Hours Of Last Main Sleep 

Start Of Main Sleep Interval 

End Of Main Sleep Interval 

Hours Driving Since Last 8-Hour Break 

Hours On Duty Since Last 8-Hour Break 

LastSleepHours 149 
LastSleepStart 149 
LastSleepEnd 150 
HoursSinceSleep 150 

MainSleepHours 151 
MainSleepStart 151 
MainSleepEnd 151 
HoursDriving 152 
HoursOnDuty 152 

Longest Work Day In Preceding 7-Day Interval WeekLongest 153 
Shortest Work Day In Preceding 7-Day Interval WeekShortest 153 
Average Work Day In Preceding 7-Day Interval WeekAverage 153 

Did The Time At Which The Driver Began To 
Sleep Rotate/Shift In Last 7 Days? 

Hours Worked On Day Of Crash 

Longest Length Of Daily Sleep In Preceding 
7-Day Interval 

Shortest Length Of Daily Sleep In Preceding 
7-Day Interval 

Average Length Of Daily Sleep In Preceding 
7-Day Interval 

Total Hours Worked On Primary Job During 
Preceding 7-Day Interval 

Rotation 154 
HoursWorked 154 
ADSLongestDay 155 
ADSShortestDay 155 
AverageDay 156 
LastWeekHours 156 

Hours Worked On Second Job During Preceding 
7-Day Interval LastWeekMoonlight 

Environment Data Set 
Variable Title Variable Name Page 

Relation To Roadway 
Relation To Junction 
Interchange 
Trafficway Flow 
Trafficway Flow Restrictions 
Intersection Type 
Number Of Travel Lanes 
Access Control 
Route Signing 
Trafficway Functional Class 
Light Conditions 
Traffic Control Device 
Railroad Grade Crossing? 
Traffic Control Device Functioning 

RoadRelation 158 
Junction 158 
Interchange 159 
ENVTrafficFlow 159 
FlowRestriction 160 
IntersectionType 160 
TravelLanes 161 
AccessControl 161 
Signage 162 
FunctionalClass 162 
Daylight 163 
TrafficControl 163 
Railroad 164 
Functioning 164 

LTCCS Analytical User's Manual LTCCS Variable List • 24 


Roadway Class 
Roadway Alignment 
Roadway Profile 
Roadway Surface Type 
Roadway Surface Condition 
Roadway Surface Defect 
Roadway Design Deficiencies 
Shoulder Surface Type 
Shoulder Width 
Rumble Strip Type/Involvement 
Sight Line Restrictions? 
Sight Line Distance 
AASHTO Sight Distance 
No Adverse Conditions 
Rain 
Snow 
Fog 
Wind Gusts 
Hail 
Sleet 
Dust 
Other Atmospheric Conditions 

RoadwayClass 165 
RoadAlignment 165 
RoadProfile 166 
RoadSurface 166 
SurfaceCondition 166 
SurfaceDefect 167 
DesignDefect 167 
ShoulderType 168 
ShoulderWidth 168 
RumbleStrip 169 
SightLineRestriction 169 
SightLineDistance 169 
AASHToDistance 170 
ENVNoConditions 170 
ENVRain 170 
ENVSnow 171 
ENVFog 171 
ENVWindGusts 171 
ENVHail 172 
ENVSleet 172 
ENVDust 172 
ENVOtherConditions 173 

Events Data Set
Variable Title Variable Name Page


Stratum 

Class Of Vehicle (First Listing) 

General Area Of Damage (First Vehicle Listed) 

Object Contacted 

Class Of Vehicle (Second Listing) 

General Area Of Damage (Second Vehicle 
Listed) 

Stratum 174 
ClassVehicle 174 
DamageArea 175 
EVEObjectContact 176 
ClassVehicle2 178 

DamageArea2 179 

FactorAssessment Data Set
Variable Title Variable Name Page


No Traffic Flow Factors 
Previous Crash Nearby 
Construction Work Zone 
Emergency Vehicle Approaching 
Rush Hour Congestion 
Other Traffic Flow Interruption 
Other Traffic Flow Interruption – Specify 
Vehicle Defect Count 
View Obstruction – Related To Load 
View Obstruction – Related To Vehicle Design 
View Obstruction - Other 
Tire Malfunction 
Braking System Malfunction 
Transmission Malfunction 
Engine Problem 
Other Vehicle Condition 

NoTraffic 180 
AFTPreviousCrash 180 
ConstructionZone 181 
EmergencyVehicle 181 
RushHour 181 
OtherTraffic 182 
OtherTrafficSpecify 182 
VehicleDefectCount 183 
LoadObstructedView 183 
DesignedObstructedView 183 
OtherViewObstruction 184 
TireFailure 184 
BrakeFailure 184 
TransmissionFailure 185 
EngineProblem 185 
OtherDefect 186 

LTCCS Analytical User's Manual LTCCS Variable List • 25 


Other Vehicle Condition – Specify 
Tire Deficiency 
Brakes Out-Of-Adjustment 
Brakes Inoperative 
Brake System Deficiency 
Vehicle Overweight 
Vehicle Lighting Deficiency 
Cargo/Load Securement Related Problem 
Suspension/Frame Deficiency 
Towing Unit Problem 
Reflective Tape Missing/Obscured 
Fuel System Problem 
Exhaust Leak 
Steering Wheel Problem 
Median Width 
Radius Of Curvature 
Sight Distance 
AASHTO Recommended Sight Distance 
Roadway Factor Count 
Traffic Signs/Signals Missing 
Roadway View Obstruction 
View Obstructed By Other Vehicle 
Road Geometry 
Road Sight Distance Insufficient 
Lane Delineation Problem 
Narrow Shoulders 
Narrow Road 
Ramp Speed 
Roadway Condition 
Slick Surface 
Road Under Water 
Road Washed Out 
Other Roadway Related Factor 
Other Roadway Related Factor – Specify 
Weather Factors Count 
Rain 
Snow 
Fog 
Wind Gust 
Hail 
Sleet 
Other Weather Related Factor 
Other Weather Related Factor – Specify 
Environmental Factor Count 
Glare 
Blowing Debris 
Smoke 
No Driver Present 
Other Sudden Change In Ambience 

OtherDefectSpecify 186 
TireDeficiency 186 
BrakesOutOfAdjustment 186 
BrakesInoperative 187 
BrakesSystemDeficiency 187 
VehicleOverweight 188 
VehicleLightingDeficiency 188 
CargoLoadSecurement 188 
SuspensionFrameDeficiency 189 
TowingUnitProblem 189 
ReflectiveTapeMissingObscured 189 
FuelSystemProblem 190 
ExhaustLeak 190 
SteeringWheelProblem 191 
MedianWidth 191 
AFTCurveRadius 191 
SightDistance 192 
AASHTORecommended 192 
RoadwayFactorCount 192 
SignsMissing 193 
ObjectObscured 193 
VehicleObscured 194 
RoadGeometry 194 
InsufficientSight 194 
BadLaneMarkings 195 
NarrowShoulders 195 
NarrowRoad 195 
RampSpeed 196 
PoorCondition 196 
SlickSurface 197 
UnderWater 197 
WashedOut 197 
OtherProblem 198 
OtherProblemSpecify 198 
WeatherCount 198 
AFTRain 199 
AFTSnow 199 
AFTFog 200 
WindGust 200 
AFTHail 200 
AFTSleet 201 
OtherWeather 201 
OtherWeatherSpecify 201 
EnvironmentCount 202 
Glare 202 
BlowingDebris 202 
Smoke 203 
AFTNoDriver 203 
OtherChangeSpecify 203 

GeneralVehicle Data Set
Variable Title Variable Name Page


Vehicle Make GVEMake 204
Vehicle Model (listed with Vehicle Make) GVEModel (with GVEMake) 206


LTCCS Analytical User's Manual LTCCS Variable List • 26 


Vehicle Model Year 

Body Type 

Class Of Vehicle 

Curb Weight 

Source Of Curb Weight 

Cargo Weight 

Source Of Cargo Weight Information 

Vehicle Identification Number (VIN) 

Vehicle Special Use 

Inspection Type 

Date Of Inspection 

Injury Severity Code – Police 

Injury Severity Code – Researched 

VIN Make 

VIN Model 

VIN Year 

Series 

VIN Body Type 

Roof1 

Roof2 

Roof3 

Front Wheel Drive 

Four Wheel Drive 

Restraint Type 

Carburetion 

Fuel Type 

VIN Weight 

Vehicle Type 

Wheel Configuration 

Daytime Running Lights 

Base Weight 

Motorcycle Displacement 

Police Reported Travel Speed 

Posted Speed 

Is The Driver Present? 

Police Reported Alcohol Present? 

Alcohol Test For Driver 

Alcohol Test Result 

Time Between Crash And Alcohol Test 

Source Of Alcohol Test Results 

Police Reported Other Drug Presence? 

Driver’s Zip Code 

Race/Ethnic Origin Of Driver 

Commercial Motor Vehicle Crashes 

Commercial Motor Vehicle Violations 

Non-Commercial Motor Vehicle Crashes 

Non-Commercial Motor Vehicle Violations 

Total Crashes 

Total Violations 

Previous Violations 

Unknown Type Crashes 

MCMIS Crashes 

MCMIS Commercial Motor Vehicle Violations 

MCMIS Commercial Motor Vehicle 
Non-Violations 

GVEYear 232 
GVEBodyType 232 
GVEVehicleClass 234 
GVECurbWeight 235 
GVEWeightSource 235 
GVECargoWeight 236 
GVECargoSource 236 
GVEVIN 237 
GVESpecialUse 237 
GVEInspection 237 
GVEInspectionDate 238 
GVEPARSevCode 238 
GVERESSevCode 239 
VINMake 239 
VINModel 240 
VINYear 240 
Series 240 
VINBodyType 241 
Roof1 241 
Roof2 241 
Roof3 241 
FrontWheelDrive 242 
FourWheelDrive 242 
GVERestraintType 242 
Carburetion 242 
FuelType 243 
VINWeight 243 
VehicleType 243 
WheelConfig 244 
DayRunningLights 244 
BaseWeight 244 
GVEMotorcycleDisplacement 244 
GVETravelSpeed 245 
GVEPostedSpeed 245 
DriverPresent 245 
PARAlcoholPresent 246 
PARAlcoholTest 246 
PARAlcoholTestResult 246 
PARTestDelay 247 
PARTestSource 247 
PARDrugsPresent 248 
ZipCode 248 
EthnicOrigin 248 
CMVCrashes 249 
CMVViolations 249 
NonCMVCrashes 250 
NonCMVViolations 250 
TotalCrashes 250 
TotalViolations 251 
PrevViolations 251 
UnkTypeCrashes 251 
MCMIScrashes 252 
MCMIScmvViolations 252 

MCMIScmvNonViolations 252 

LTCCS Analytical User's Manual LTCCS Variable List • 27 


HazMat Data Set 

Variable Title Variable Name Page 

Hazardous Material
Reportable?
Hazardous Material Waiver?


Variable Title 

Material 253 
Reportable 254 
Waiver 254 

HazMatInsp Data Set 

Variable Name Page 

Hazardous Material Inspection
Inspection Exists?
Violation?
Out-Of-Service?
Disposition


Variable Title 

HMIInspection 255 
InspectionExists 255 
HMIViolation 256 
HMIOutOfService 256 
HMIDisposition 256 

Injuries Data Set 

Variable Name Page 

Occupant Injury Description 
AIS Code 
Aspect 
Injury Source Category 
Injury Source 
Intrusion Row 
Intrusion Location 
Crush Direction 
Crush Magnitude 
Component Intrusion 
Information Source 

Variable Title 

OINDescription 257 
AISCode 257 
Aspect 289 
InjurySourceCat 291 
InjurySource 292 
IntrusionRow 297 
IntrusionLocation 298 
CrushDirection 298 
CrushMagnitude 298 
Component 299 
InformationSource 300 

JackknifeAssessments Data Set 

Variable Name Page 

Type Of Jackknife Event 
Source Of Jackknife Impetus 
Vehicle Location At Start Of Jackknife 
Direction Of Rotation 
Jackknifed While Count 
Driving At Constant Velocity 
Traversing A Curve 
Completing A Turn 
Light Braking 
Accelerating 
Completing Avoidance Maneuver 
Other Jackknife Circumstance 
Throttle Input Only 
Moderate Braking 
Heavy Braking 
Traversing A Straight Section 

AJKType 301 
AJKSource 301 
AJKLocation 302 
AJKDirection 302 
WhileCount 302 
AJKConstant 303 
AJKCurve 303 
AJKTurn 303 
AJKLightBraking 304 
AJKAccelerating 304 
AJKAvoidance 304 
AJKOther 305 
AJKDecelerating 305 
AJKModerateBraking 305 
AJKHeavyBraking 306 
AJKStraight 306 

LTCCS Analytical User's Manual LTCCS Variable List • 28 


MCMISdriverData Data Set 

Variable Title Variable Name Page 

Number Of Crashes Crashes 307 
Number Of Inspections Inspections 307 
Driver Out-Of-Service Violations InspDriverOOS 308 
Vehicle Out-Of-Service Violations InspVehOOS 308 
Total Types Of Local Violations LocalViols 308 
Total Types Of Inspection Violations InspViols 309 

MCMISviolation Data Set 

Variable Title Variable Name Page 

Violation Code Code 310 
Violation Description ViolDesc 323 
Total Number Of Violations NumViols 323 
Number Of Out-Of-Service Violations NumOOSviols 324 

NonMotorists Data Set 

Variable Title Variable Name Page 

Nonmotorist’s Age 

Nonmotorist’s Height 

Nonmotorist’s Weight 

Nonmotorist’s Gender 

Nonmotorist Type 

Nonmotorist Attitude 

Nonmotorist’s Motion 

Nonmotorist’s Action Relative To Vehicle 

Nonmotorist’s Body (Chest) Orientation Relative 
To Striking Vehicle… 

Nonmotorist Sight Impairments 

Nonmotorist Sight Restrictions 

Nonmotorist Hearing Impairments 

Nonmotorist Hearing Restrictions 

Nonmotorist Distractions 

Nonmotorist Decision Errors 

Nonmotorist Risk-Taking Behavior 

Nonmotorist First Avoidance Action 

Nonmotorist Hand Use In Avoidance Action 

Injury Severity Code – Police 

Injury Severity Code – Researched 

ANMAge 325 
ANMHeight 325 
ANMWeight 325 
ANMGender 326 
ANMType 326 
ANMPosition 326 
Motion 327 
Action 328 

Orientation 328 
SightImpaired 329 
SightRestricted 329 
HearingImpaired 329 
HearingRestricted 330 
Distraction 330 
ANMDecision 331 
RiskTaking 331 
ANMAvoidance 332 
HandsUsed 332 
ANMPARSevCode 332 
ANMRESSevCode 333 

Occupants Data Set
Variable Title Variable Name Page


Occupant’s Age OCCAge 334
Occupant’s Height OCCHeight 334


LTCCS Analytical User's Manual LTCCS Variable List • 29 


Occupant’s Weight 

Occupant’s Sex 

Occupant’s Role 

Race/Ethnic Origin Of Occupant 

Occupant’s Eyewear 

Police Reported Air Bag Availability/Function 

Police Reported Belt Use 

Ejection Type 

Ejection Area 

Ejection Medium 

Medium Status 

Multi-Ejection? 

Entrapment 

Occupant Mobility 

Number Of Intrusions 

Occupant Location 

Occupant’s Posture 

Head Restraint Type At This Occupant’s 
Position 

Head Restraint Damage By Occupant At This 
Occupant Position 

Seat Type 

Seat Orientation 

Seat Track Position 

Seat Performance 

Does The Seat Have Integrated Passenger 
Belts? 

Seat Back Incline Prior To Impact 

Seat Back Incline Position Post Impact 

Child Safety Seat Used? 

Manual (Active) Belt System Availability 

Manual (Active) Belt System Used In This 
Crash? 

Proper Use Of Manual (Active) Belts 

Manual (Active) Belt Failure Modes During 
Crash 

Manual Shoulder Belt Upper Anchorage 
Adjustment 

Seat Belt Pretensioners Present 

Pretensioners Actuate? 

Pretensioner Travel 

Retractor Type 

Source Of Researcher’s Determination Of 
Manual Belt Use 

Automatic (Passive) Belt System 
Availability/Function 

Automatic (Passive) Belt System Use 

Automatic (Passive) Belt System Type 

OCCWeight 334 
OCCGender 335 
Role 335 
Race 335 
Eyewear 336 
AirbagAvail 336 
BeltUsed 337 
EjectionType 337 
EjectionArea 337 
Medium 338 
MediumStatus 338 
MultiEjection 339 
Entrapment 339 
Mobility 339 
Intrusions 340 
OCCLocation 340 
Posture 341 

OCCRestraintType 341 

RestraintDamage 342 
SeatType 342 
SeatOrientation 342 
TrackPosition 343 
SeatPerformance 343 

IntegratedRestraints 343 
PriorInclination 344 
PostInclination 344 
ChildSeatAvailable 345 
ManualBeltAvailable 345 

ManualBeltUsed 346 
ManualBeltProper 346 

ManualBeltFailure 347 

AnchorAdjustment 347 
PreTensionerAvailable 348 
PreTensionerActuated 348 
PreTensionerTravel 348 
Retractor 349 

ManualBeltSource 349 

AutoBeltAvailable 349 
AutoBeltUsed 350 
BeltMotorized 350 

Proper Use Of Automatic (Passive) Belt System AutoBeltProper 
Automatic (Passive) Belt Failure Modes During 

 Crash 

Source Of Researcher’s Determination Of 
Automatic Belt Use 

Injury Severity Code – Police 

Mortality 

Medical Treatment 

AutoBeltFailure 351 

AutoBeltSource 352 
OCCInjSeverityCode 352 
Mortality 352 
InitialTreatment 353 

LTCCS Analytical User's Manual LTCCS Variable List • 30 


Type Of Medical Facility (Initial Treatment) 
Hospital Stay 
Working Days Lost 
Death Date 
Death Time 
Number Of Injuries For This Occupant 
Glasgow Coma Scale (GCS) Score 
(At Medical Facility) 
Was The Occupant Given Blood? 
Arterial Blood Gases – ABG (HCO3) 

InitialFacility 353 
HospitalDays 354 
WorkDaysLost 354 
DateOfDeath 354 
TimeOfDeath 355 
InjuryCount 355 

GCSScore 355 
UnitsTransfused 356 
ABGTest 356 

Overview Data Set 

Variable Title Variable Name Page 

Vehicle Make OVEMake 358 
Vehicle Model (with Vehicle Make) OVEModel (with OVEMake) 360 
Vehicle Model Year OVEYear 386 
Truck Configuration OVEConfiguration 386 
Pre-Event Movement Movement 387 
Critical Precrash Event OVECriticalEvent 388 
Critical Reason For The Critical Precrash Event OVEReason 390 
Attempted Avoidance Maneuver OVEAvoidance 391 

Pre-Impact Stability 
Pre-Impact Location 
Right-Of-Way? 
Crash Configuration 
Crash Type 
Jackknife Occurrence 
Cargo Shift 
Alcohol Involvement 
Drug Involvement 
Driver Physical Factors 
Driver Fatigue 
Recognition Factors 
Decision Factors 
Aggression Factors 
Surveillance Factors 
Emotion/Experience Factors 
Carrier/Employer Factors 
Traffic Factors 
Vehicle Factors 
Roadway Factors 
Weather Factors 
Environmental Factors 
Speed/Distance Factors 
Nonmotorist Involvement 

Variable Title 

OVEStability 392 
OVELocation 392 
OVERightOfWay 393 
OVEAccidentType 393 
OVECrashCode 394 
OVEJackKnife 396 
OVECargoShift 397 
OVEAlcohol 397 
AnyDrugsVeh 397 
DriverPhysical 398 
DriverFatigue 398 
OVERecognition 399 
OVEDecision 399 
Aggression 399 
OVESurveillance 400 
EmotionExperience 400 
CarrierEmployer 401 
Traffic 401 
VehicleState 401 
Roadway 402 
Weather 402 
OVEenvironment 402 
OVESpeed 403 
NonMotorist 403 

PARViolations Data Set 

Variable Name Page 

Violations Charged As A Result Of This Crash PARViolationCode 404
Police Description Of Violation PARDescription 406


LTCCS Analytical User's Manual LTCCS Variable List • 31 


SaferAuthorityStatus Data Set 
Variable Title Variable Name Page


Common Status CommonStatus 407 
Contract Status ContractStatus 407 
Broker Status BrokerStatus 407 

SaferCarrier Data Set 
Variable Title Variable Name Page 

Carrier Status 
Authorized For-Hire 
Exempt For-Hire 
Private Property 
Private Passengers (Business) 
Private Passengers (Non-Business) 
Migrant 

U.S. Mail 
Federal Government 
State Government 
Local Government 
Indian Tribe 
Other 
Unknown 
Carrier Operation Description 
Cargo Carried 
Number Of Drivers 
Number Of Power Units 
Mileage Year 
Carrier-Reported Mileage 

Status 408 
AuthorizedForHire 408 
ExemptForHire 408 
PrivateProperty 409 
PrivatePassengersBusiness 409 
PrivatePassengersNonBusiness 409 
Migrant 410 
USMAIL 410 
FederalGovernment 410 
StateGovernment 411 
LocalGovernment 411 
IndianTribe 411 
Other 411 
Unknown 412 
CarrierOperationDescription 412 
CargoCarried 412 
CountDrivers 412 
CountPowerUnits 413 
MileageYear 413 
Mileage 413 

SaferCrashSummary Data Set 
Variable Title Variable Name Page


Crash Year 
Number Of Fatalities 
Number Of Injuries 
Number Of Towaways 

Variable Title 

SCSYear 414 
SCSFatalities 414 
SCSInjuries 414 
SCSTowaway 415 

SaferDriverCrashReport Data Set 

Variable Name Page 

Date Of Crash SCDDate 416 
Crash State SCDState 416 
Driver’s Date Of Birth SCDDateOfBirth 416 
Number Of Fatalities SCDFatalities 416 
Number Of Injuries SCDInjuries 417 
Towaway? SCDTowaway 417 
Hazardous Material? HazardousMaterial 417 

LTCCS Analytical User's Manual LTCCS Variable List • 32 


SaferDriverInspection Data Set
Variable Title Variable Name Page


Level Code 
Inspection Date 
Inspection State 
Driver Date Of Birth 
Total Number Of Violations 
Total Number Of Out-Of-Service Violations 
HazMat? 

LevelCode 424 
SDIDate 424 
SDIState 424 
SDIDriverDOB 424 
TotalViolations 425 
TotalOOS 425 
HazMat 425 

SaferDriverViolation Data Set 

Variable Title Variable Name Page 

Violation Type SDVViolation 426 
Unit Number UnitNumber 426 
Unit Type SDVUnitType 427 
Number Of Out-Of-Service Violations SDVOutOfService 427 

SaferInspectionsSummary Data Set 

Variable Title Variable Name Page 

Number Of Driver Inspections 

Number Of Driver Out-Of-Service Inspections 

Driver Out-Of-Service Percentage 

Average Number Of Driver Out-Of-Service 
Violations 

Number Of Vehicle Inspections 

Number Of Vehicle Out-Of-Service Inspections 

Vehicle Out-Of-Service Percentage 

Average Number Of Vehicle Out-Of Service 
Violations 

Number Of HazMat Inspections 

Number Of HazMat Out-Of-Service Inspections 

HazMat Out-Of-Service Percentage 

Average Number Of HazMat Out-Of-Service 
Violations 

Total Number Of Inspections 

DriverInspections 428 
DriverOutOfService 428 
DriverOutOfServicePerc 428 

DriverViolationsAverage 428 
VehicleInspections 429 
VehicleOutOfService 429 
VehicleOutOfServicePerc 429 

VehicleViolationsAverage 429 
HazMatInspections 430 
HazMatOutOfService 430 
HazMatOutOfServicePerc 430 

HazMatViolationsAverage 430 
SISTotal 431 

SaferInsurance Data Set
Variable Title Variable Name Page


Bodily Injury & Property Damage Insurance 
Required? 

Bodily Injury & Property Damage Insurance 
Status 

Cargo Insurance Required 

Cargo Insurance Status 

Bond Required 

Bond Status 

Minimum Coverage Amount 

Liability Insurance Amount 

BIPDRequired 432 

BIPDOK 432 
CargoRequired 432 
CargoOK 433 
BondRequired 433 
BondOK 433 
MinCoverageAmount 433 
LiabilityInsurance 434 

LTCCS Analytical User's Manual LTCCS Variable List • 33 


SaferReview Data Set 

Variable Title Variable Name Page 

Rating Date 
Safety Rating 
Review Date 
Review Type 

Variable Title 

RatingDate 435 
Rating 435 
ReviewDate 435 
ReviewType 435 

SafeStat Data Set 

Variable Name Page 

SafeStat Score Date
Overall SafeStat Score
Accident Safety Evaluation Area (SEA)
Driver Safety Evaluation Area (SEA)
Vehicle Safety Evaluation Area (SEA)
Safety Management Safety Evaluation Area 


STADate 437 
Score 437 
AccidentSEA 437 
DriverSEA 438 
VehicleSEA 438 

SafetySEA 438 
STACategory 438 
CategoryDescription 439 

(SEA) 
SafeStat Category 
Category Description 

Variable Title 

TruckExterior Data Set 
Variable Name Page 

Power Unit Type 
Cab Style 
Dromedary Box? 
Sleeper Berth? 
Were Blind Spots Related To Crash? 
Data Recorder Installed? 
Vehicle Speed 
Gear Position 
Total Number Of Trailers 
Total Empty Weight 
Total Cargo Weight 
Total GVWR 
Truck Configuration 
Total Length 
Placard Required? 
Mirror Count 
Right Door Mirror 
Left Door Mirror 
Right Fender Mirror 
Left Fender Mirror 
Other Location Mirror 
ITS Equipment Count 
Headway Detection Unit 
Side/Object Detection Unit 
Rollover Warning Unit 
Other ITS Equipment 

PowerUnitType 440 
CabStyle 440 
DromedaryBox 441 
SleeperBerth 441 
BlindSpot 441 
DataRecorder 442 
TEXSpeed 442 
GearPosition 443 
TrailerCount 443 
TEXEmptyWeight 444 
CMDBCargoWeight 444 
TOTALGVWR 444 
TEXConfiguration 445 
TEXTotalLength 445 
PlacardRequired 446 
MirrorCount 446 
RightDoorMirror 446 
LeftDoorMirror 447 
RightFenderMirror 447 
LeftFenderMirror 447 
OtherLocationMirror 448 
ITSCount 448 
ITSHeadway 448 
ITSSideObject 449 
ITSRollover 449 
ITSOther 450 

LTCCS Analytical User's Manual LTCCS Variable List • 34 


TruckInspection Data Set 

Variable Title Variable Name Page 

Unit Position 
Violation Code 
Violation Type 
Out Of Service Violation? 
Disposition Of Truck 

Variable Title 

TINPosition 451 
TINViolationCode 451 
ViolationType 464 
TINOutofService 465 
TINDisposition 465 

TruckUnits Data Set 

Variable Name Page 

Unit Position In Vehicle Configuration 

Unit Type In Vehicle Configuration 

Trailer Body Type 

Cargo Type 

Unit VIN 

Manufacture Date 

Empty Weight Of Unit 

Cargo Weight Of Unit 

GVWR 

Total Length Of Unit 

Percent Of Cargo Capacity 

Tank Capacity 

Tank Load 

Hazardous Cargo? 

Cargo Spillage 

Number Of Axles In Use 

Number Of Lift Axles (Not In Use) 

Number Of Steer Axles 

Retroflective Tape Condition On Rear 

Retroflective Tape Condition On Sides 

Retroflective Tape Used? 

Retroflective Tape Pattern 

Retroflective Tape Color 

Retroflective Tape Peeling/Damaged On Rear 
Underride Guard 

Retroflective Tape Peeling/Damaged On Other 
Rear Area 

Retroflective Tape Peeling/Damaged On Sides 

TUNPosition 466 
TUNUnitType 466 
TUNBodyType 467 
CargoType 467 
TUNVIN 468 
ManufactureDate 468 
TUNEmptyWeight 469 
TUNCargoWeight 469 
GVWR 470 
TUNTotalLength 470 
CapacityPercent 471 
TankCapacity 471 
TankLoad 471 
Hazard 472 
TUNSpillage 472 
AxlesUsed 473 
AxlesNotUsed 473 
SteerableAxles 473 
RearTapeCond 474 
SideTapeCond 474 
ReflectTapeType 474 
ReflectTapePattern 475 
ReflectTapeColor 475 

UnderrideTapePeel 476 

RearTapePeel 476 
SideTapePeel 476 

VehicleEvents Data Set
Variable Title Variable Name Page


Origin Of Fire 

Fire Occurrence 

Rollover Type 

Quarter Turns 

Rollover Initiation Type 

Rollover Initiation Location 

Rollover Initiation – Object Contacted 

Location On Vehicle Where Initial Principal 
Tripping Force Is Applied 

FireOrigin 478 
FireSeverity 478 
RolloverType 479 
QuarterTurns 479 
RollInitType 479 
RollInitLocation 480 
RollObject 480 

RollTrip 482 

LTCCS Analytical User's Manual LTCCS Variable List • 35 


Direction Of Initial Roll RollDirect 483 
Manner Of Collision CollisionManner 483 
First Harmful Event FirstHarmfulEvent 484 

VehicleExterior Data Set 

Variable Title Variable Name Page 

Body Category BodyCategory 486 
Is The Vehicle In Transport? InTransport 491 
Inspection Type InspectionType 491 
Type Of Transmission Transmission 492 
Drive Wheels DriveWheels 492 
Left Front Tire Restricted? LFRestricted 493 
Left Rear Tire Restricted? LRRestricted 493 
Right Rear Tire Restricted? RRRestricted 493 
Right Front Tire Restricted? RFRestricted 493 
Left Front Tire Deflated? LFDeflated 494 
Left Rear Tire Deflated? LRDeflated 494 
Right Rear Tire Deflated? RRDeflated 494 
Right Front Tire Deflated? RFDeflated 495 
Wheelbase Wheelbase 495 
Overall Length OverallLength 495 
Maximum Width MaxWidth 496 
Average Track Width AverageTrack 497 
Front Overhang FrontOverhang 497 
Rear Overhang RearOverhang 497 
Undeformed End Width EndWidth 498 
Researcher’s Assessment Of Vehicle 

 Disposition VehicleDisposition 498 
Justification For Researcher’s Assessment Of

 Vehicle Disposition Justification 498 
Multi-Stage Or Altered Vehicle? MultiStage 498 

LTCCS Analytical User's Manual LTCCS Variable List • 36 


Variable Definitions and Codes 
Variable definitions and attributes for all of the LTCCS data sets, including SAFER and MCMIS 
data sets, are provided here. This section is organized alphabetically by data set. Within each 
data set, the variables are ordered as they appear in the data sets. For each variable the 
following information is included (where applicable:) 

(Sample variable listing) 

Object Contacted Category 

Definition: This variable describes the category of object involved in a particular impact to a 
vehicle. 

(Source of the data to provide context and further background) 

Source: Researcher determined — primary sources are the scene and vehicle inspections; 
secondary sources include the police report and interviewees. 

(Cross Reference* information provides insight and possible alternatives) 

Cross Reference: Derived from CDCCrush.CDCObjectContact. 

Variable Name: ObjectContactClass 

Attribute Codes 
Code1 
Meaning 
Vehicle 
2 Noncollision 
3 
5 
6 
7 
Collision with Fixed Object 
Collision with Nonfixed Object 
Unknown event or object 
Other event (specify) 

*Explanation of terms used in Cross Reference entries: 


Identical – The variable is exactly the same as another variable. 
Related to – The variable depicts the same type of information. 
Congruent – The variable has what appears to be identical information, yet the source is different. 
Derived from – The variable depicts the same information as another variable, but this variable is 


not as detailed. 


Elaborates on – The variable depicts the same information as another variable, but this variable is 
more detailed. 
Computed from – The variable provides a count of attributes given by the following variables. 
When applicable – This is used when the number of records in the 2 data sets are not the same. 


All cross references are expressed in <TABLE>.<FIELD> format. 


LTCCS Analytical User's Manual Variable Definitions and Codes • 37 


Variable Definitions and Codes - Airbags Data Set 
Airbags Data Set 

The Airbags data set contains the variables CaseID, PSU, PSUStrat, RATWeight, VehicleNumber 
and AirbagNumber. AirbagNumber is assigned to each airbag in the vehicle. Each record is 
uniquely identified by CaseID, VehicleNumber and AirbagNumber. CaseID and VehicleNumber 
should be used to merge the Airbag data set with vehicle level data sets. CaseID, 
VehicleNumber and AIROccupantNumber should be used to merge the Airbag data set with the 
Occupant data set. This data set also contains the following variables: 

Cross Reference: This table is related to Occupants.AirbagAvail. 

Air Bag Occupant Number 

Definition: This variable represents the occupant associated with this air bag, identified by their 
occupant number. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
include the interview, repair facilities, tow facility, and medical records. 

Cross Reference: Related to Occupants.AirbagAvail, values will differ in part due to Police 
Report vs. Researcher determined values. 

Variable Name: AIROccupantNumber 

Attribute Codes 
Code* 
99 
Meaning 
Value 
Unknown 
Seat Row 1 

Definition: This variable is used to identify an air bag deployment that occurred in the first row of 
seats in the vehicle. 

Variable Name: SeatRow1 

Attribute Codes 
Code0-5 
9 
Meaning 
Seat row value 
Unknown 
Seat Location 1 

Definition: This variable is used to identify the seat location in the first row of the vehicle where 
an air bag deployment occurred. 

Variable Name: SeatLocation1 

Attribute Codes 
Code0-4 
9 
Meaning 
Seat row value 
Unknown 

LTCCS Analytical User's Manual Airbags Data Set • 38 


Variable Definitions and Codes - Airbags Data Set 

Seat Row 2 

Definition: This variable is used to identify an air bag deployment that occurred in the second 
row of seats in the vehicle. 

Variable Name: SeatRow2 

Attribute Codes 
Code0-5 
9 
Meaning 
Seat Row value 
Unknown 
Seat Location 2 

Definition: This variable is used to identify the seat location in the second row of the vehicle 
where an air bag deployment occurred. 

Variable Name: SeatLocation2 

Attribute Codes 
Code0-4 
9 
Meaning 
Seat Row value 
Unknown 

Deployment Location Of Air Bag 

Definition: This variable identifies the location of a particular air bag. 

Variable Name: AirbagLocation 

Attribute Codes 

Code Meaning 

1 Steering Wheel Hub 
2 Top Instrument Panel 
3 Mid Instrument Panel 
4 Bottom Instrument Panel 
5 Seat Back 
6 Door 
7 Roof Side Rail 
98 Other 
99 Unknown 

Air Bag Status 

Definition: This variable documents the availability of the air bag. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
include the interview, police report, and medical records. NOTE: The use of the police report is 
limited. If there is no vehicle inspection and the only secondary source is the PAR, then the PAR 

LTCCS Analytical User's Manual Airbags Data Set • 39 


Variable Definitions and Codes - Airbags Data Set 

must clearly indicate that the vehicle is airbag equipped and/or deployed either in the "narrative" 
or "restraint system" block. 

Variable Name: AirbagStatus 

Attribute Codes 
Code Meaning 
1 Airbag Available 
2 Airbag disconnected (specify) 
3 Airbag not reinstalled 
9 Unknown if airbag available for this crash 
Type Of Air Bag 

Definition: This variable describes the type of air bag present. 

Source: Researcher determined — primary source is the interview, secondary sources may 
include the repair facility and/or documents found in the vehicle. 

Variable Name: AirbagType 

Attribute Codes 

Code Meaning 

1 Orig. man. installed sys. 
2 Retrofitted Air Bag 
3 Replacement Air Bag 
4 Unknown Type 
8 Not applicable 
9 Unknown 

Redesigned Air Bag 

Definition: This variable indicates whether or not the vehicle was equipped with a redesigned air 
bag for this location. Redesigned air bags include second-generation air bags, next-generation air 
bags, Air Bag II, advanced air bags, and other innovative systems that have been developed to 
make use of air bag protection technology. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
include VIN and interview. 

Variable Name: Depowered 

Attribute Codes 

Code Meaning 

0 Not Redesigned 
1 Redesigned 
2 Advanced (specify) 
70 No air bag available for this crash 
99 Unknown 

LTCCS Analytical User's Manual Airbags Data Set • 40 


Variable Definitions and Codes - Airbags Data Set 

Air Bag Deployment 

Definition: This variable describes when in the crash sequence the air bag deployed. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
include the interview, repair facilities, tow facility, police report, and medical records. NOTE: The 
use of the police report is limited. If there is no vehicle inspection and the only secondary source 
is the PAR, then the PAR must clearly indicate that an air bag deployed either in the "narrative" or 
in a "restraint system" block. 

Variable Name: Deployment 

Attribute Codes 

Code Meaning 

1 Deployed during crash (as a result of impact) 

2 Deployed, inadvertently just prior to crash 

3 Deployed, details unknown 

4 Deployed as a result of a non-collision event during accident sequence (e.g. 

fire, explosion, electrical) 

7 Not deployed 

70 No airbag functional for this crash 

99 Unknown if deployed 

Indications Of Air Bag Failure? 

Definition: This variable documents whether or not something abnormal has occurred to the air 
bag system. It may not necessarily mean that the air bag system was defective. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
include the interview, repair facilities, tow facility, police report, and medical records. NOTE: The 
use of all secondary sources is limited. If there is no vehicle inspection, then the secondary 
sources are limited to the reporting of "no failure". If the only secondary source is the PAR and no 
failure is alleged, then the PAR must clearly indicate that an air bag deployed either in the 
"narrative" or in a "restraint system" block. 

Variable Name: AirbagFailure 

Attribute Codes 

Code Meaning 

0 No 
1 Yes (specify) 
70 Airbag not available 
79 Unknown if available 
99 Unknown 


Type Of Cutoff Switch 

Definition: This variable describes the type of air bag cutoff switch present in the vehicle. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
may include the police report, repair facilities, and tow facility. 

Variable Name: SwitchType 

LTCCS Analytical User's Manual Airbags Data Set • 41 


Variable Definitions and Codes - Airbags Data Set 
Attribute Codes 

Code Meaning 
0 None present 
1 Originally equipped 
2 Retro fit 
3 Switch present, type unknown 
9 Unknown if switch present 

Cutoff Switch Position Status 

Definition: This variable describes the status of the airbag cutoff switch at the time of the crash. 

Source: Researcher determined — primary source is the vehicle inspection; secondary sources 
may include the police report, repair facilities, and tow facility. 

Variable Name: SwitchStatus 

Attribute Codes 
Code0 
1 
Meaning 
Switch On/Automatic 
Switch off 
7 
8 
9 
None present 
Unknown if switch present 
Switch status unknown 

Did Air Bag Module Cover Flaps Open At Designated Tear Points? 

Definition: This variable documents whether or not the air bag properly opened at its tear points. 
A designated tear point is a weakened area of the flap material designed to allow the air bag easy 
escape from its storage area during deployment. Some air bags in the seat cushion and seat 
back may not have cover flaps, but will deploy through a seam that separates during the air bag 
deployment. 

Source: Researcher determined — primary source is the vehicle inspection, secondary source is 
the interview 

Variable Name: FlapsOpen 

Attribute Codes 

Code Meaning 

0 No 
1 Yes 
60 Not deployed 
69 Unknown if deployed 
70 No airbag available for this crash 
79 Unknown 
99 Unknown if flaps/seams opened at tear points 

LTCCS Analytical User's Manual Airbags Data Set • 42 


Variable Definitions and Codes - Airbags Data Set 

Were The Cover Flaps Damaged? 

Definition: This variable indicates whether or not the air bag cover flaps sustained damage 
during deployment. Normal separation/tearing at the designated tear points does not constitute 
damage. 

Source: Researcher determined — primary source is vehicle inspection; secondary source is the 
interview. 

Variable Name: FlapsDamaged 

Attribute Codes 
Code Meaning 
0 No 
1 Yes (specify) 
60 Not deployed 
69 Unknown if deployed 
70 No airbag available for this crash 
99 Unknown if airbag module cover flaps opened at tear points 

Was There Damage To The Air Bag? 

Definition: This variable documents any damage to the air bag during the crash sequence. 

Source: Researcher determined — primary source is the vehicle inspection; secondary source 
may include the interview. 

Variable Name: AirbagDamage 

Attribute Codes 

Code Meaning 

0 Not Damaged 
1 Ruptured 
2 Cut 
3 Torn 
4 Punctured 
5 Burned 
6 Abraded 
60 Not deployed 
69 Unknown if deployed 
70 No airbag available for this crash 
88 Other damage (specify) 
95 Damaged, details unknown 
99 Deployed, unknown if damaged 

Source Of Air Bag Damage 

Definition: This variable documents the source of damage to the air bag during the crash 
sequence. This variable is related to the variable “Was There Damage To The Air Bag?” 

Source: Researcher determined — primary source is the vehicle inspection; secondary source 
includes the interview. 

LTCCS Analytical User's Manual Airbags Data Set • 43 


Variable Definitions and Codes - Airbags Data Set 
Variable Name: DamageSource 

Attribute Codes 
Code Meaning 
1 Object worn by occupant (specify) 
2 Object carried by occupant (specify) 
3 Adaptive/assistive controls (specify) 
4 Cover flaps 
5 Fire in vehicle 
6 Thermal burns 
7 Windshield 
8 Rescue or emergency efforts 
50 Not Damaged 
59 Deployed, unknown if damaged 
60 Not deployed 
69 Unknown if deployed 
70 No airbag available for this crash 
88 Other damage source (specify) 
99 Damaged, unknown source 

Had The Vehicle Been In Previous Crashes? 

Definition: This variable documents whether the vehicle had been in any previous crashes (that 
may or may not have involved air bag deployment). 

Source: Researcher determined — primary source is the interview, secondary source may 
include a repair facility. 

Variable Name: PriorCrashes 

Attribute Codes 
Code Meaning 
1 No previous crashes 
2 Previous crash(es) without deployment(s) 
3 One previous crash with deployment 
4 More than one previous crash with at least one deployment 
8 Previous crashes, unknown deployment status 
9 Unknown 

Had Any Prior Maintenance/Service Been Performed On Air Bag System? 

Definition: This variable indicates whether or not the air bag had received any maintenance or 
service work prior to the crash. 

Source: Researcher determined — primary source is the interview, secondary sources may 
include repair facilities and or documents found in the vehicle. 

Variable Name: PriorMaintenance 

LTCCS Analytical User's Manual Airbags Data Set • 44 


Variable Definitions and Codes - Airbags Data Set 

Attribute Codes 

Code Meaning 

0 No 
1 Yes (specify) 
9 Unknown 


CDC For Air Bag Deployment Impact 

Definition: This variable indicates the CDC’s delta V rating for the impact associated with this air 
bag’s deployment. 

Source: Researcher determined — primary sources are the scene and vehicle inspection; 
secondary sources are the police report and the interviewee. 

Variable Name: CDC 

Attribute Codes 

Code Meaning 

1 Highest Delta V 
2 Second Highest Delta V 
3 Other delta V (specify) 
9 Unknown 
60 Not deployed 
69 Unknown if deployed 
70 No airbag available for this crash 
99 Deployed, unknown event 


Was The Air Bag In This Occupant’s Position Contacted By Another Occupant? 

Definition: This variable documents whether another occupant (besides the intended occupant) 
contacted this particular air bag. 

Variable Name: ContactOther 

Attribute Codes 

Code Meaning 

0 No 
1 Yes (specify) 
60 Not deployed 
69 Unknown if deployed 
70 Airbag not functional (disconnected or not reinstalled) 
79 Unknown 
99 Deployed, unknown if other occupant contact to airbag 


LTCCS Analytical User's Manual Airbags Data Set • 45 


Variable Definitions and Codes - Brakes Data Set 

Brakes Data Set 

The Brakes data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber, and Axle uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the Brakes data set with vehicle level data 
sets. This data set also contains the following variables: 

Axle 

Definition: This variable identifies the axle to which the brake information is related. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: Axle 

Attribute Codes 
Code1-15 
99 
Meaning 
Value 
Unknown 
Brake Type 

Definition: This variable documents the type of brake system present at a particular axle. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: BrakeType 
Attribute Codes 
Code Meaning 

1 Air 
2 Hydraulic 
3 Electric 
9 Unknown 

Brake Axle Position 

Definition: This variable identifies on which unit of the truck configuration a particular axle is 
located. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: BRAPosition 

Attribute Codes 
Code Meaning 
1-4 Number of Unit where axle is located 
9 Unknown 

LTCCS Analytical User's Manual Brakes Data Set • 46 


Variable Definitions and Codes - Brakes Data Set 

ABS Installed? 

Definition: This variable indicates whether or not ABS is available at a particular axle. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: ABSInstalled 

Attribute Codes 
Code0 
1 
99 
Meaning 
No 
Yes 
Unknown 
ABS Functional? 

Definition: This variable indicates whether or not the ABS is functioning properly at a particular 
axle. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: ABSFunctional 

Attribute Codes 
Code0 
1 
99 
Meaning 
No 
Yes 
Unknown 
Adjustor Type 

Definition: This variable indicates the type of brake adjustment system that is present at a 
particular axle. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: AdjustorType 
Attribute Codes 
Code Meaning 

1 Man 
2 Auto 
99 Unknown 

Chamber Size 

Definition: This variable documents the size of the brake chamber for the braking system at a 
particular axle. 

LTCCS Analytical User's Manual Brakes Data Set • 47 


Variable Definitions and Codes - Brakes Data Set 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: ChamberSize 

Attribute Codes 

Code Meaning 

0.00-1000.00 Size in cm 
8887 Not applicable 
9994 Not Examined 
9999 Unknown 


Chamber Type 

Definition: This variable documents the type of chamber for a braking system at a particular 
axle. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: ChamberType 

Attribute Codes 

Code Meaning 

1 A 6-15/16 1-3/8 
2 B 9-3/16 1-3/4 
3 C 8-1/16 1-3/4 
4 D 5-1/4 1-1/4 
5 E 6-3/16 1-3/8 
6 F 11 2-1/4 
7 G 9-7/8 2 
8 C-6 4-1/2 1-1/4 
9 C-9 5-1/4 1-3/8 
10 C-12 5-11/16 1-3/8 
11 C-16 6-3/8 1-3/4 
12 C-20 6-25/32 1-3/4 
13 C-24 7-7/32 1-3/4 
14 C-30 8-3/32 2 
15 C-36 9 2-1/4 
16 D-30 8-1/8 2-1/4 
17 DISC NA 
18 ELEC NA 
19 HYDR NA 
20 L-16 6-3/8 2.0 
21 L-20 6-25/32 2.0 
22 L-24 7-7/32 2.0 
23 L-24* 7-7/32 2.5 
24 L-30 8-3/32 2.5 
25 MM 8-1/8 2-1/4 
26 R-9 4-9/32 1-1/2 
27 R-12 4-13/16 1-1/2 


LTCCS Analytical User's Manual Brakes Data Set • 48 


Variable Definitions and Codes - Brakes Data Set 

28 R-16 5-13/32 2 
29 R-20 5-15/16 2 
30 R-24 6-13/32 2 
31 R-30 7-1/16 2-1/4 
32 R-36 7-5/8 2-3/4 
33 R-50 8-7/8 3 
34 WEDG 5/16 5/16 
88 Not applicable 
99 Unknown 


Stroke Type 

Definition: This variable indicates whether a particular chamber type is categorized as long or 
short. 

Source: Researcher determined — primary source is vehicle inspection, secondary sources 
include FMCSA Truck Inspector and/or Level 1 inspection report. 

Variable Name: StrokeType 

Attribute Codes 

Code Meaning 

1 Long 
2 Short 
3 Not Examined 
9 Unknown 


Left Length 

Definition: This variable documents the length of the left brake chamber at a particular axle. 
This value is measured and provided by the FMCSA Truck Inspector. 

Source: Researcher determined — primary source is the Level 1 inspection report. 

Variable Name: LeftLength 

Attribute Codes 

Code Meaning 

0.00-100.00 Size in cm 
8887 Not applicable 
9992 Inoperable 
9994 Not examined 
9999 Unknown 


Right Length 

Definition: This variable documents the length of the right brake chamber at a particular axle. 
This value is measured and provided by the FMCSA Truck Inspector. 

Source: Researcher determined — primary source is the Level 1 inspection report. 

Variable Name: RightLength 

LTCCS Analytical User's Manual Brakes Data Set • 49 


Variable Definitions and Codes - Brakes Data Set 

Attribute Codes 
Code0.00 - 100.00 
Meaning 
Size in cm 
8887 
9992 
9994 
Not applicable 
Inoperable 
Not examined 
9999 Unknown 

LTCCS Analytical User's Manual Brakes Data Set • 50 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

CargoShiftAssessments Data Set 

The CargoShiftAssessments data set contains the variables CaseID, PSU, PSUStrat, 
RATWeight, and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in 
this data set and should be used to merge the CargoShiftAssessments data set with other vehicle 
level data sets. This data set also contains the following variables: 

Source: All variables in this table are determined by Case Reviewer using all available 
information inputs. Primary sources include the scaled schematic, police report, driver interviews, 
witness interviews, and vehicle inspection results. Input from the truck inspection staff can also be 
utilized to code this variable. 

Type Of Cargo Shift Event 

Definition: This variable documents the occurrence of a precrash cargo shift and the type of 
freight that shifted. The cargo shift must occur prior to any impact event. 

Cross Reference: Elaborates on CrashAssessment.ACRCargoShift. Elaborates on 
Overview.OVECargoShift. 

Variable Name: ACSType 

Attribute Codes 

Code Meaning 

0 No pre-crash cargo shift 
1 Boxed general freight (solids) 
2 Bulk freight (containerized) 
3 Bulk freight (not containerized) 
4 Large objects (solids) 
5 Tank – solids 
6 Tank – liquids 
77 Not applicable 
88 Other (specify) 
99 Unknown 


Vehicle Location At Start Of Cargo Shift 

Definition: This variable establishes the vehicle location at the start of the cargo shift sequence. 

Cross Reference: Congruent with IntvwDrCargoShift.IDGLocation, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSLocation 

Attribute Codes 

Code Meaning 

0 No pre-crash event 
1 On roadway 
2 On shoulder 
3 On roadside 
4 On median 
7 Not applicable 
9 Unknown 


LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 51 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Movement Count 

Definition: This variable documents the number of circumstances that were identified in which 
the cargo shift event occurred. This variable refers to the movements of the vehicle prior to the 
cargo shift. 

Cross Reference: Computed from the following variables in the CargoShiftAssessments data 
set: ACSConstant, ACSCurve, ACSTurn, ACSLightBraking, ACSAccelerating, ACSAvoidance, 
OtherMovement, ACSDecelerating, ACSModerateBraking, ACSHeavyBraking, ACSStraight. 

Variable Name: MovementCount 

Attribute Codes 
Code0-13 
88 
99 
Meaning 
Value counter 
No Driver 
Unknown 
Cause Count 

Definition: This variable documents the number of circumstances associated with a cargo shift 
that were coded for this vehicle. This variable refers to the possible causes of the cargo shift. 

Cross Reference: Computed from the following variables in the CargoShiftAssessments data 
set: ImproperGeneralLoading, ImproperBulkLoading, SparseTieDowns, WeakTieDowns, 
OtherSolids, Sloshing, BaffleFailure, CompartmentFailure, TankFailure, OtherLiquids, 
OtherCargos, UnknownCause. 

Variable Name: CauseCount 

Attribute Codes 
Code0-13 
88 
99 
Meaning 
Value counter 
No Driver 
Unknown 

Precrash Cargo Spillage? 

Definition: This variable establishes the occurrence of cargo spillage during the precrash phase. 

Cross Reference: Congruent with IntvwDrCargoShift.IDGSpillage, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSSpillage 

Attribute Codes 

Code Meaning 

0 No pre-crash cargo shift 
1 Yes (specify) 
2 No 
7 Not applicable 
9 Unknown 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 52 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Driving At Constant Velocity 

Definition: This variable establishes whether or not the driver is attempting to maintain a 
constant velocity at the time that the cargo begins to shift. (This variable was originally an 
attribute choice under the variable “Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGDrivingConstantVelocity, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: ACSConstant 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Traversing A Curve 

Definition: This variable establishes whether or not the driver is traversing a curve at the time 
that the cargo begins to shift. (This variable was originally an attribute choice under the variable 
“Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGTraversingCurve, values will differ due 
to Interview vs. Researcher determined values. 

Variable Name: ACSCurve 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Completing Turn 

Definition: This variable establishes whether or not the driver is attempting to turn at the time 
that the cargo begins to shift. (This variable was originally an attribute choice under the variable 
“Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGCompletingTurn, values will differ due 
to Interview vs. Researcher determined values. 

Variable Name: ACSTurn 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Light Braking 

Definition: This variable establishes whether or not the driver is decelerating using light braking 
effort at the time that the cargo begins to shift. While the term “light braking” is a subjective 
evaluation, it generally implies that the level of braking is less than the level typically associated 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 53 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

with a normal traffic stop. (This variable was originally an attribute choice under the variable 
“Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGLightBraking, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSLightBraking 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Accelerating 

Definition: This variable establishes whether or not the driver is accelerating at the time that the 
cargo begins to shift. (This variable was originally an attribute choice under the variable 
“Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGAccelerating, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSAccelerating 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Completing Avoidance Maneuver 

Definition: This variable establishes whether or not the driver initiates a precrash avoidance 
maneuver at or prior to the time that the cargo begins to shift. (This variable was originally an 
attribute choice under the variable “Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGCompletingAvoidance, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: ACSAvoidance 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Event Circumstance 

Definition: This variable establishes whether or not the driver/vehicle action or velocity is not 
described by the other cargo shift occurrence variables. (This variable was originally an attribute 
choice under the variable “Circumstances In Which Event Occurred” and was the “Other 
(specify):” attribute choice.) 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 54 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Cross Reference: Congruent with IntvwDrCargoShift.IDGOtherSpecify, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: OtherMovement 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Throttle Input Only 

Definition: This variable establishes whether or not the driver is decelerating and decelerates 
solely by reducing throttle input at the time that the cargo begins to shift. (This variable was 
originally an attribute choice under the variable “Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGDecelerating, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSDecelerating 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Moderate Braking 

Definition: This variable establishes whether or not the driver is decelerating using a moderate 
level of braking effort at the time that the cargo begins to shift. A moderate level of braking effort 
generally implies that the level of braking effort is similar to the level typically associated with a 
normal traffic stop. (This variable was originally an attribute choice under the variable 
“Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGModerateBraking, values will differ due 
to Interview vs. Researcher determined values. 

Variable Name: ACSModerateBraking 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Heavy Braking 

Definition: This variable establishes whether or not the driver is decelerating using a heavy level 
of braking effort (e.g. panic stop) at the time that the cargo begins to shift. The vehicle will 
typically experience wheel “lock-up” in this circumstance; however, wheel lock is not a 
requirement for using this designation. (This variable was originally an attribute choice under the 
variable “Circumstances In Which Event Occurred.”) 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 55 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Cross Reference: Congruent with IntvwDrCargoShift.IDGHeavyBraking, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ACSHeavyBraking 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Traversing A Straight Section 

Definition: This variable establishes whether or not the driver is traversing a straight roadway 
segment at the time that the cargo begins to shift. (This variable was originally an attribute choice 
under the variable “Circumstances In Which Event Occurred.”) 

Cross Reference: Congruent with IntvwDrCargoShift.IDGTraversingStraightSection, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: ACSStraight 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Improper Loading (General Freight) 

Definition: This variable establishes whether or not the cargo shift is associated with improper 
loading of general freight cargo. Usually, the cargo is not properly balanced during the loading 
process (e.g. large boxes on top of small boxes, inappropriate gaps between cargo units, etc.). 
This element is also used when the freight is not properly distributed over the length of the cargo 
area. (This variable was originally an attribute choice under the variable “Cargo Shift Associated 
With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.SolidImproperLoadGeneral, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: ImproperGeneralLoading 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Improper Loading (Bulk Freight) 

Definition: This variable establishes whether or not the cargo shift is associated with improper 
loading of bulk freight cargo. Usually, the cargo consists of one or several large items that are not 
properly balanced. (This variable was originally an attribute choice under the variable “Cargo Shift 
Associated With.”) 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 56 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Cross Reference: Congruent with IntvwDrCargoShift.SolidImproperLoadBulk, values will differ 
due to Interview vs. Researcher determined values. 

Variable Name: ImproperBulkLoading 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Inadequate Securement (Number Of Tie Downs) 

Definition: This variable establishes whether or not the cargo shift is associated with an 
inadequate number of tie downs used. This circumstance is most typically associated with bulk 
freight items. (This variable was originally an attribute choice under the variable “Cargo Shift 
Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.SolidInadeqSecureNumber, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: SparseTieDowns 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Inadequate Securement (Strength Of Tie Downs) 

Definition: This variable establishes whether or not the cargo shift is associated with inadequate 
strength of the tie downs that are used. This circumstance is most typically associated with bulk 
freight items. (This variable was originally an attribute choice under the variable “Cargo Shift 
Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.SolidInadeqSecureStrength, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: WeakTieDowns 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Source Of Solids Shift 

Definition: This variable establishes whether or not the cargo shift (solid freight) is associated 
with a specific factor that is not covered under the loading or securement variables. (This variable 
was originally an attribute choice under the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.SolidOther, values will differ due to 
Interview vs. Researcher determined values. 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 57 


Variable Definitions and Codes - CargoShiftAssessments Data Set 
Variable Name: OtherSolids 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Less Than Full Load (Slosh) 

Definition: This variable establishes whether or not the cargo shift (liquids) is associated with 
liquid slosh due to the truck carrying less than a full load. This affects vehicle stability. (This 
variable was originally an attribute choice under the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.LiquidLessLoad, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: Sloshing 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Baffle Failure 

Definition: This variable establishes whether or not the cargo shift (liquids) is associated with a 
baffle failure that affects vehicle stability. (This variable was originally an attribute choice under 
the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.LiquidBaffleFailure, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: BaffleFailure 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Compartment Partition Failure 

Definition: This variable establishes whether or not the cargo shift (liquids) is associated with a 
failure of a partition for at least one of the vehicle’s compartments. This failure subsequently 
affects vehicle stability. (This variable was originally an attribute choice under the variable “Cargo 
Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.LiquidCompartmentFailure, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: CompartmentFailure 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 58 


Variable Definitions and Codes - CargoShiftAssessments Data Set 
Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Tank Failure 

Definition: This variable establishes whether or not the cargo shift (liquids) is associated with a 
tank failure (e.g. seam failure). The failure may or may not affect vehicle stability. (This variable 
was originally an attribute choice under the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.LiquidTankFailure, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: TankFailure 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Source Of Liquid Shift 

Definition: This variable establishes whether or not the cargo shift (liquid freight) is associated 
with a specific factor that is not covered under the other liquid cargo shift variables. (This variable 
was originally an attribute choice under the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.LiquidOther, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: OtherLiquids 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Cargo Shift Types 

Definition: This variable establishes whether or not the cargo type is neither solid nor liquid (e.g. 
grains, bulk powders, etc.) and the vehicle experiences a cargo shift. (This variable was originally 
an attribute choice under the variable “Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.OtherCargoType, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: OtherCargos 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 59 


Variable Definitions and Codes - CargoShiftAssessments Data Set 

Unknown Cause Of Cargo Shift 

Definition: This variable establishes whether or not there is insufficient information to determine 
if a cargo shift occurred. (This variable was originally an attribute choice under the variable 
“Cargo Shift Associated With.”) 

Cross Reference: Congruent with IntvwDrCargoShift.UnknownAssoc, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: UnknownCause 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

LTCCS Analytical User's Manual CargoShiftAssessments Data Set • 60 


Variable Definitions and Codes - CDCCrush Data Set 

CDCCrush Data Set 

The CDCCrush data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber, EventNumber and ImpactNumber. EventNumber identifies a particular event in 
a sequence in the accident. ImpactNumber identifies each particular impact in the crush profile 
for a vehicle. CaseID, VehicleNumber, EventNumber and ImpactNumber uniquely identify each 
record in this data set. (Each record can also be uniquely identified by CaseID, VehicleNumber, 
EventNumber and PositionNumber.) CaseID and EventNumber should be used to merge the 
CDCCrush data set with the Events data set. CaseID and VehicleNumber should be used to 
merge the CDCCrush data set with vehicle level data sets. CaseID, VehicleNumber and 
PositionNumber should be used to merge the CDCCrush data set with the TruckUnits data set. 
This data set also contains the following variables: 

Position Number 

Definition: This variable identifies the unit number on the vehicle associated with a CDC/TDC. 
For example, a truck-trailer’s power unit would be Position Number “1,” and the first trailer would 
be Position Number “2.” A passenger vehicle would be assigned Position Number “1.” 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: PositionNumber 
Attribute Codes 

Code Meaning 

* Value 
Deformation Classification Type 

Definition: This variable indicates whether the deformation classification is related to a car or a 
truck. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DCType 

Attribute Codes 
CodeC 
T 
Meaning 
Car 
Truck 

Object Contacted Category 

Definition: This variable describes the category of object involved in a particular impact to a 
vehicle. 

Source: Researcher determined — primary sources are the scene and vehicle inspections; 
secondary sources include the police report and interviewees. 

Cross Reference: Derived from CDCCrush.CDCObjectContact. 

LTCCS Analytical User's Manual CDCCrush Data Set • 61 


Variable Definitions and Codes - CDCCrush Data Set 

Variable Name: ObjectContactClass 

Attribute Codes 
Code1 
Meaning 
Vehicle 
2 Noncollision 
3 
5 
6 
7 
Collision with Fixed Object 
Collision with Nonfixed Object 
Unknown event or object 
Other event (specify) 

CDC Object Contacted 

Definition: This variable identifies the object that was contacted for this event/impact. 

Source: Researcher determined. 

Cross Reference: Related to VehicleEvents.FirstHarmfulEvent, if CDCCrush.EventNumber = 1. 

Variable Name: CDCObjectContact 

Attribute Codes 
Code Meaning 

Vehicle#1 
Vehicle#2 
Vehicle#3 
Vehicle#4 
Vehicle#5 
Vehicle#6 
Vehicle#7 
Vehicle#8 
Vehicle#9 
Vehicle#10 
Vehicle#11 
Vehicle#12 
Vehicle#13 
Vehicle#14 
Vehicle#15 
Vehicle#16 
Vehicle#17 
Vehicle#18 
Vehicle#19 
Vehicle#20 
Vehicle#21 
Vehicle#22 
Vehicle#23 
Vehicle#24 
Vehicle#25 
Vehicle#26 
Vehicle#27 

LTCCS Analytical User's Manual CDCCrush Data Set • 62 


Variable Definitions and Codes - CDCCrush Data Set 

28 Vehicle#28 
29 Vehicle#29 
30 Vehicle#30 
31 Overturn->rollover (excludes end-over-end) 
32 Rollover->end-over-end 
33 Fire or explosion 
34 Jackknife 
35 Other intraunit damage (specify) 
36 Noncollision injury 
38 Other noncollision (specify) 
39 Noncollision->details unknown 
41 Tree (<= 10 cm in diameter) 
42 Tree (> 10 cm in diameter) 
43 Shrubbery or bush 
44 Embankment 
45 Breakaway pole or post (any diameter) 
50 Nonbreakaway pole or post (<=10cm in diameter) 
51 Nonbreakaway pole or post (>10 cm but <= 30 cm in diameter) 
52 Nonbreakaway pole or post (>30 cm in diameter) 
53 Nonbreakaway pole or post (diameter unknown) 
54 Concrete traffic barrier 
55 Impact attenuator 
56 Other traffic barrier (includes guardrail) (specify) 
57 Fence 
58 Wall 
59 Building 
60 Ditch or culvert 
61 Ground 
62 Fire hydrant 
63 Curb 
64 Bridge 
68 Other fixed object (specify) 
69 Unknown fixed object 
70 Pass. car, light truck, van, or other vehicle not in-transport 
71 Medium/heavy truck or bus not in-transport 
72 Pedestrian 
73 Cyclist or cycle 
74 Other nonmotorist or conveyance (specify) 
75 Vehicle occupant 
76 Animal 
77 Train 
78 Trailer, disconnected in transport 
79 Object fell from vehicle in-transport 
88 Other nonfixed object (specify) 
89 Unknown nonfixed object 
98 Other event (specify) 
99 Unknown event or object 

LTCCS Analytical User's Manual CDCCrush Data Set • 63 


Variable Definitions and Codes - CDCCrush Data Set 

Force Direction 

Definition: This variable indicates the direction of force exerted upon the vehicle by an object. If 
the force is applied directly upon the center of the front bumper, the force of direction is said to be 
“0.” The direction of force rotates to the right around the vehicle in increments of 10 degrees, 
circling around the vehicle until it returns to the front (360 degrees). This value is used to create 
the variable “Clock Force.” 

Source: Restricted to vehicle inspection or photographs. 

Variable Name: ForceDirection 

Attribute Codes 

Code Meaning 

0-360 Value (degrees) 
888 Not applicable 
999 Unknown 


Clock Force 

Definition: This variable identifies the direction from which the principal force is applied for a 
particular impact. The direction of force is based on the face of a clock (e.g. an impact to the front 
bumper is classified as “12”) and is the first two columns of each impact’s CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: ClockForce 

Attribute Codes 
Code0-98 
99 
Meaning 
Value 
Unknown 

Override/Underride 

Definition: This variable indicates that this vehicle overrode or underrode another vehicle. 
“Override” is coded when this vehicle overrides (i.e. goes on top of) the bumper of another 
vehicle, and “underride” is coded when this vehicle underrides (i.e. goes below) the bumper of 
another vehicle. For override/underride in combination cases (CDS/Truck cases), the attribute 
“Medium/heavy truck or bus override” is used. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include driver interviews. 

Variable Name: OverrideDesc 

Attribute Codes 

Code Meaning 

1 None 
2 Override 
3 Underride 
4 Medium/heavy truck or bus over 

LTCCS Analytical User's Manual CDCCrush Data Set • 64 


Variable Definitions and Codes - CDCCrush Data Set 

11 Underride, compartment intrusion 
12 Underride, no compartment intrusion 
13 Underride, compartment intrusion unknown 
14 Override, motor vehicle in transport 
15 Override, motor vehicle not in transport 
16 Unknown 

Deformation Location 

Definition: This variable documents the initial plane of contact to the vehicle and represents the 
general area of the vehicle. This is the third column in a coded CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Cross Reference: Related to Events.DamageArea or Events.DamageArea2. 

Variable Name: DeformLocation 

Attribute Codes 

Code Meaning 

9 9 Unknown 
B B Back of unit w/ cargo area 
C C Rear of cab 
D D Back - rear of tractor 
F F Front 
L L Left Side 
R R Right Side 
T T Top 
U U Undercarriage 
V V Front of cargo area 

Deformation – Longitudinal Or Lateral 

Definition: This variable documents the lateral or longitudinal area of the vehicle that contains 
the contact deformation. This is the fourth column in a coded CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DeformLong 

Attribute Codes 
Code CDCPlane Meaning 
9 1 9 Unknown 
9 2 9 Unknown 
B 1 B Side rear of cab to rear of trailer/cargo area 
B 2 B Rear Section 
C 1 C Center - front or rear 
D 1 D Distributed - side or end 
D 2 D Distributed - (F+P+B) 
F 1 F Side Front - frontof windshield 

LTCCS Analytical User's Manual CDCCrush Data Set • 65 


Variable Definitions and Codes - CDCCrush Data Set 

F 2 F Front Section 
K 1 K Side(P + W) 
L 1 L Left - front or rear 
P 1 P Side cab 
P 2 P Center Section 
R 1 R Right - front or rear 
S 1 S Side(F + P + W) 
T 1 T Trailer 
T 2 T Trailer 
W 1 W Side rear of cab to rear of tractor 
Y 1 Y Side (F + P) OR End (L + C) 
Y 2 Y Side Front/Center Section (F+P) 
Z 1 Z Side (P + B) OR End (C + R) 
Z 2 Z Side Center/Rear Section(P+B) 

Deformation – Vertical Or Lateral 

Definition: This variable documents either the vertical or lateral area of the vehicle that contains 
the contact deformation. The vertical location is used for vertical planes (F, B, L, R) and the 
lateral location is used for horizontal planes (T, U). This is the fifth column in a coded CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DeformVertical 

Attribute Codes 
Code CDCPlane Meaning 
9 1 9 Unknown 
9 2 9 Unknown 
A 1 A Top to Bottom of vehicle / no wheels 
B 1 B Belt Line and above 
C 2 C Center 
D 2 D Distributed 
E 1 E belt line and below 
F 1 F Belt line/below on trailer 
G 1 G Belt line and above 
H 1 H Top of frame to top of vehicle 
L 1 L Low - top of frame, frame, and bottom of frame 
L 2 L Left 
M 1 M Middle -- top of frame to belt line or hood 
R 2 R Right 
T 1 T Everything above cab 
T 2 T Trailer 
W 1 W Below undercarriage level (wheels and tires only) 
Y 2 Y Left and Center (L+C) 
Z 2 Z Right and Center(R+C) 

LTCCS Analytical User's Manual CDCCrush Data Set • 66 


Variable Definitions and Codes - CDCCrush Data Set 

Deformation Distribution 

Definition: This variable documents the general type of damage distribution for the impact. This 
classification provides a qualitative description of the type of damage sustained by the vehicle. 
This is the sixth column of a coded CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DeformDistribution 

Attribute Codes 
Code Meaning 
9 9 Unknown 
A A Overhanging Structure 
E E Corner 
K Conversion in impact type 
N N Narrow Impact Area 
O O Rollover (include side) 
R R Override 
S S Sideswipe 
U U No residual deformation 
W W Wide Impact Area 

Deformation Extent 

Definition: This variable documents the extent of damage for the impact. The extent of residual 
deformation is classified using a nine-zone extent system. Extent is a mathematical determination 
of which zone the crush extends into, beginning with Zone “1.” This is the seventh column of a 
coded CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DeformExtent 

Attribute Codes 
Code Meaning 
0A 0A 
0B 0B 
0C 0C 
0D 0D 
0X 0X 
Ei Eight 
Fi Five 
Fo Four 
Ni Nine 
On One 
Se Seven 
Si Six 
Th Three 

LTCCS Analytical User's Manual CDCCrush Data Set • 67 


Variable Definitions and Codes - CDCCrush Data Set 

Tw Two 
Un Unknown 
Deform Code 

Definition: This variable identifies the direction from which the principal force is applied for a 
particular impact. The direction of force is based on the face of a clock (e.g. an impact to the front 
bumper is classified as “12”) and is the first two columns of each impact’s CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: DeformCode 

Attribute Codes 
Code0-98 
99 
Meaning 
Value 
Unknown 
Impact Number 

Definition: This variable identifies the CDC/TDC that is linked to a particular crush profile. 
Variable Name: ImpactNumber 
Attribute Codes 

Code Meaning 

* Value 
9 Unknown CDC 
Direct Damage Location 

Definition: This variable describes the location of the direct damage on the vehicle for each 

impact. This information is used to determine the CDC/TDC for the impact. 
Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Cross Reference: Related to Events.DamageArea and Events.DamageArea2. 
Variable Name: DamageLocation 
Attribute Codes 

Code Meaning 

* Text description of the location of direct damage on the vehicle 
Field L Location 

Definition: This variable describes the location of the Field L on the vehicle. Field L represents 
direct and induced deformation. This information is used to determine the CDC/TDC for the 
impact. 

LTCCS Analytical User's Manual CDCCrush Data Set • 68 


Variable Definitions and Codes - CDCCrush Data Set 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: FieldLocation 
Attribute Codes 
Code Meaning 

* Text description of the location of the Field L on the vehicle 
Max Crush Location 

Definition: This variable describes the location in the crush profile of the maximum crush of this 
impact to the vehicle. This information is used to determine the CDC/TDC for the impact. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: MaxCrushLocation 

Attribute Codes 
Code Meaning 
* Text description of the location in the crush profile of the maximum crush of 
this impact to the vehicle 
CDC Category 

Definition: This variable describes the information provided by columns 3-7 in a coded 
CDC/TDC. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: CDCCategory 

Attribute Codes 

Code Meaning 

1 Deformation location 
2 Long/Lateral location 
3 Vert/Lateral location 
4 Damage distribution 
5 Damage extent 
97 Not applicable 
99 Unknown 

CDC Width 

Definition: This variable indicates the direct damage width. This is a measured value on the 
vehicle that is used in determining the CDC/TDC for this impact/event. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Variable Name: CDCWidth 

LTCCS Analytical User's Manual CDCCrush Data Set • 69 


Variable Definitions and Codes - CDCCrush Data Set 

Attribute Codes 
Code Meaning 

* Value (cm) 
9997 Not Collected 
9999 Unknown 
LTCCS Analytical User's Manual CDCCrush Data Set • 70 


Variable Definitions and Codes - Crash Data Set 

Crash Data Set 

The Crash data set contains the variables CaseID, PSU, PSUStrat and RATWeight. CaseID 
uniquely identifies each record in this data set and should be used to merge the Crash data set 
with other data sets. This data set also contains the following variables: 

Crash Date 

Definition: This variable identifies the date of the crash. 
Source: Researcher determined — substantiated by police report and medical records. 
Variable Name: CrashDate 

Attribute Codes 
Code* 
Meaning 
Date (in YYYY-MM-DD format) 
Time Of Crash 

Definition: This variable identifies the time of day of the crash. 
Source: Police report. 
Variable Name: CrashTime 
Attribute Codes 


Code Meaning 

* Time (in HH:MM format) 
Total Number Of Vehicles In Crash 

Definition: This variable documents the total number of vehicles that were involved in the crash. 
This includes all CDS, non-CDS, in-transport, and not in-transport vehicles. 

Source: Researcher determined — substantiated by police report. 

Cross Reference: Can be derived from any vehicle specific data sets including: 
CargoShiftAssessments, CrashAssessment, CrashDiscussion, Environment, FactorAssessment, 
GeneralVehicle, JackknifeAsssessments, Overview, VehicleEvents. 

Variable Name: VehicleCount 

Attribute Codes 
Code* 
Meaning 
Value 
Truck Count 

Definition: This variable represents the total number of heavy trucks involved in the crash. 
Source: Researcher determined — substantiated by police report. 

LTCCS Analytical User's Manual Crash Data Set • 71 


Variable Definitions and Codes - Crash Data Set 

Cross Reference: Can be derived from GeneralVehicle.GVEBodyType (60, 61, 62, 63, 64, 66, 
67, 68, 69, 70, 74, 78). Can be derived from the truck specific data sets including: TruckExterior 
and TruckUnits. 

Variable Name: TruckCount 

Attribute Codes 
Code* 
Meaning 
Value 
Car Count 

Definition: This variable represents the total number of passenger vehicles involved in the 
crash. 
Source: Researcher determined — substantiated by police report. 
Cross Reference: Can be derived from GeneralVehicle.GVEBodyType (1-22 and 28-48). 
Variable Name: CARCount 
Attribute Codes 
Code Meaning 

* Value 
Nonmotorist Count 

Definition: This variable identifies the number of nonmotorists involved in the crash. 
Source: Researcher determined — substantiated by police report. 
Cross Reference: Can be derived from the NonMotorist data set. Related to 


Overview.NonMotorist. 


Variable Name: NonMotoristCount 

Attribute Codes 
Code* 
Meaning 
Value 
Crash Summary 

Definition: This variable is a combination of two variables separated by “-+-”. The first is a 
description of the overall crash scenario. The second is a general description of the crash 
configuration. 

Source: Derived variable. 

Variable Name: CrashType 

LTCCS Analytical User's Manual Crash Data Set • 72 


Variable Definitions and Codes - Crash Data Set 

Attribute Codes 
Code Meaning 

* Text that combines two variables to describe the overall crash scenario 
Injury Crash Severity Code – Police 

Definition: This variable represents the highest injury severity rating in the case, as determined 
by police on the Police Accident Report (PAR). 

Source: Police report 

Cross Reference: Can be derived from the combination of GeneralVehicle.GVEPARSevCode 
and NonMotorist.ANMPARSevCode. 

Variable Name: CrashPARSevCode 

Attribute Codes 
Code Meaning 
0 O - No injury 
1 C - Possible injury 
2 B - Non-incapacitating injury 
3 A - Incapacitating injury 
4 K - Killed 
5 U - Injury, severity unknown 
6 Died prior to crash 
9 Unknown 

Injury Crash Severity Code – Researched 

Definition: This variable represents the highest injury severity rating in the case, as determined 
by injury coding and case narratives. This code is based on occupant medical records and/or 
case narratives and may differ from the police-reported injury severity code. 

Source: Zone Center determined – based on occupant medical records and case narratives, 
including the police report. 

Cross Reference: Can be derived from the combination of GeneralVehicle.GVERESSevCode 
and NonMotorist.ANMResSevCode. 

Variable Name: CrashRESSevCode 

Attribute Codes 

Code Meaning 

0 O - No injury 
1 C - Possible injury 
2 B - Non-incapacitating injury 
3 A - Incapacitating injury 
4 K - Killed 
5 U - Injury, severity unknown 
6 Died prior to crash 
9 Unknown 

LTCCS Analytical User's Manual Crash Data Set • 73 


Variable Definitions and Codes - Crash Data Set 

Case Summary 

Definition: This variable is the researcher’s description of the crash events/sequence. 
Source: Written by researcher using all available case evidence. 
Cross Reference: Related to CrashDiscussion.Discussion, values are not identical in all cases 


due to Crash.Summary being crash specific and CrashDiscussion.Discussion is vehicle specific.


Variable Name: Summary 
Attribute Codes 
Code Meaning 

* Detailed description of the crash events 
Day Of Week Of Crash 

Definition: This variable identifies the day of the week that the crash occurred. 
Source: Derived variable. 
Variable Name: Day
Attribute Codes 


Code Meaning 

1 Sunday 
2 Monday 
3 Tuesday 
4 Wednesday 
5 Thursday 
6 Friday 
7 Saturday 

Collision Type 

Definition: This variable describes the type of vehicles involved in the crash using the following 
vehicle classifications. These classifications are “strung together” to indicate the number and 
type of each vehicle involved in the crash. 

CAR Automobile or automobile type BodytypeId within (1..9, 17) 
OLV Other light vehicle BodytypeID within (10..16, 19) 
VAN Minivan to full size Van BodytypeId within (20..28) 
PICKUP Light vehicle pick ups Bodytypeid within (30..39) 
LIGHT TRUCK Other light trucks Bodytypeid within (40..49) 
BUS Buses BodytypeID within (50..59) 
TRUCK Trucks BodytypeID within 
(60..64,66..78) 
MHOME Large motorhome Bodytypeid within (65) 
MCYCLE Motorcycle and mopeds Bodytypeid within (80..89) 
OTHER Bodytypeid within (90..97) 
MULTI VEHICLE More than 5 vehicles in the crash 
Source: Derived variable. 

LTCCS Analytical User's Manual Crash Data Set • 74 


Variable Definitions and Codes - Crash Data Set 

Variable Name: CollisionType 

Attribute Codes 
Code Meaning 
1 BUS-TRUCK 
2 CAR-BUS-TRUCK 
3 CAR-CAR-CAR-CAR-TRUCK 
4 CAR-CAR-CAR-OLV-TRUCK 
5 CAR-CAR-CAR-PICKUP-TRUCK 
6 CAR-CAR-CAR-TRUCK 
7 CAR-CAR-CAR-TRUCK-TRUCK 
8 CAR-CAR-LIGHT TRUCK-TRUCK 
9 CAR-CAR-LIGHT TRUCK-TRUCK-TRUCK 
10 CAR-CAR-OLV-TRUCK 
11 CAR-CAR-PICKUP-TRUCK 
12 CAR-CAR-TRUCK 
13 CAR-CAR-TRUCK-TRUCK 
14 CAR-CAR-TRUCK-TRUCK-TRUCK 
15 CAR-CAR-VAN-PICKUP-TRUCK 
16 CAR-CAR-VAN-TRUCK 
17 CAR-CAR-VAN-TRUCK-TRUCK 
18 CAR-LIGHT TRUCK-TRUCK 
19 CAR-OLV-OLV-TRUCK 
20 CAR-OLV-PICKUP-TRUCK 
21 CAR-OLV-PICKUP-TRUCK-TRUCK 
22 CAR-OLV-TRUCK 
23 CAR-OLV-TRUCK-MCYCLE 
24 CAR-OLV-TRUCK-TRUCK 
25 CAR-OLV-VAN-TRUCK 
26 CAR-OLV-VAN-TRUCK-TRUCK 
27 CAR-PICKUP-PICKUP-TRUCK 
28 CAR-PICKUP-TRUCK 
29 CAR-PICKUP-TRUCK-TRUCK 
30 CAR-TRUCK 
31 CAR-TRUCK-MCYCLE 
32 CAR-TRUCK-TRUCK 
33 CAR-TRUCK-TRUCK-MCYCLE 
34 CAR-TRUCK-TRUCK-TRUCK 
35 CAR-TRUCK-TRUCK-TRUCK-TRUCK 
36 CAR-VAN-PICKUP-TRUCK 
37 CAR-VAN-PICKUP-TRUCK-TRUCK 
38 CAR-VAN-TRUCK 
39 CAR-VAN-TRUCK-TRUCK 
40 CAR-VAN-VAN-VAN-TRUCK 
41 LIGHT TRUCK-TRUCK 
42 LIGHT TRUCK-TRUCK-TRUCK 
43 MULTI VEHICLE 
44 OLV-OLV-TRUCK 
45 OLV-PICKUP-PICKUP-TRUCK-TRUCK 

LTCCS Analytical User's Manual Crash Data Set • 75 


Variable Definitions and Codes - Crash Data Set 

46 OLV-PICKUP-TRUCK 
47 OLV-TRUCK 
48 OLV-TRUCK-TRUCK 
49 OLV-TRUCK-TRUCK-TRUCK 
50 OLV-VAN-PICKUP-TRUCK 
51 OLV-VAN-TRUCK 
52 PICKUP-PICKUP-PICKUP-TRUCK 
53 PICKUP-PICKUP-TRUCK 
54 PICKUP-TRUCK 
55 PICKUP-TRUCK-TRUCK 
56 PICKUP-TRUCK-TRUCK-TRUCK-TRUCK 
57 TRUCK 
58 TRUCK-MCYCLE 
59 TRUCK-OTHER 
60 TRUCK-TRUCK 
61 TRUCK-TRUCK-MHOME 
62 TRUCK-TRUCK-TRUCK 
63 TRUCK-TRUCK-TRUCK-TRUCK 
64 TRUCK-TRUCK-TRUCK-TRUCK-TRUCK 
65 VAN-PICKUP-TRUCK 
66 VAN-TRUCK 
67 VAN-TRUCK-MCYCLE 
68 VAN-TRUCK-TRUCK 
69 VAN-VAN-TRUCK 
70 VAN-VAN-TRUCK-TRUCK 
71 CAR-CAR-PICKUP-PICKUP-TRUCK 

Medical Treatment 

Definition: This variable represents the highest level of treatment of any occupant in the case. 


Source: Researcher determined — inputs include interviewee, police report, and medical 
records. 
Cross Reference: Related to Occupants.InitialTreatment. 
Variable Name: Treatment 


Attribute Codes 
Code Meaning 
0 No treatment 
1 Dead on Arrival (DOA) at hospital 
2 Dead prior to Admission 
3 Hospitalization 
4 Transported and released 
5 Treatment at scene - non-transported 
6 Treatment later 
7 Transported to a medical facility-unknown if treated 
8 Treatment - other (specify) 
9 Unknown 

LTCCS Analytical User's Manual Crash Data Set • 76 


Variable Definitions and Codes - Crash Data Set 

Occupant Fatality 

Definition: This variable documents if there were any occupant fatalities in the case. 

Source: Researcher determined — primary source is medical records; secondary source is 
police report. 

Variable Name: OCCFatality 

Attribute Codes 
Code0 
Meaning 
Not Fatal 
1 Fatal 
2 
9 
Fatal - ruled disease (specify) 
Unknown 

Alcohol Involvement? 

Definition: This variable documents whether or not alcohol was involved in the crash. 

Source: Zone Center determined – based on occupant medical records, police report, and 
interviews. 

Cross Reference: Congruent with GeneralVehicle.PARAlcoholPresent, values will differ due to 
Police Report vs. Researcher determined values. 

Variable Name: CRAAlcohol 

Attribute Codes 
Code1 
2 
9 
Meaning 
Yes 
No 
Unknown 

Drug Involvement? 

Definition: This variable documents whether or not any drugs (legal or illegal) were present or 

involved in the crash. 
Source: Zone Center determined – based on occupant medical records, police report, and 
interviews. 

Cross Reference: Can be derived from the DriverDrugs data set. 
Variable Name: AnyDrugsCrash 
Attribute Codes 

Code Meaning 

1 Yes 
2 No 
9 Unknown 

LTCCS Analytical User's Manual Crash Data Set • 77 


Variable Definitions and Codes - CrashAssessment Data Set 

CrashAssessment Data Set 

The CrashAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the CrashAssessment data set with other vehicle level data sets. This 
data set also contains the following variables: 

Pre-Event Movement 

Definition: This variable establishes the subject vehicle’s pre-critical event movement pattern. 
The pre-event movement pattern is usually described as the point which both precedes the 
critical precrash envelope and which precedes vehicle motions that place the involved vehicle(s) 
on an imminent collision path. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, and witness interviews. It should be 
noted, however, that this may be a subjective decision based on the preponderance of available 
evidence. 

Cross Reference: Identical to Overview.Movement. 

Variable Name: PreEventMovement 

Attribute Codes 
Code Meaning 
0 No driver present 
1 Going Straight 
2 Decelerating in traffic lane 
3 Accelerating in traffic lane 
4 Starting in traffic lane 
5 Stopped in traffic lane 
6 Passing or overtaking another vehicle 
7 Disabled or parked in travel lane 
8 Leaving a parking position 
9 Entering a parking position 
10 Turning right 
11 Turning left 
12 Making a U-turn 
13 Backing up (other than for parking position) 
14 Negotiating a curve 
15 Changing lanes 
16 Merging 
17 Successful avoidance maneuver to a previous critical event 
98 Other (specify) 
99 Unknown 

Critical Precrash Event 

Definition: This variable identifies the event which made the crash imminent (i.e. something 
occurred which made the collision inevitable). A precrash critical event is coded for each vehicle 
in the crash and documents the circumstances leading to this vehicle’s first impact in the crash 
sequence. 

LTCCS Analytical User's Manual CrashAssessment Data Set • 78 


Variable Definitions and Codes - CrashAssessment Data Set 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic; police report, driver interviews, witness interviews, and vehicle 
inspection results. It should be noted, however, that this may be a subjective decision based on 
the preponderance of available evidence. 

Cross Reference: Elaborates on CrashAssessment.CriticalEventCat. Identical to 
Overview.OVECriticalEvent. 

Variable Name: ACRCriticalEvent 

Attribute Codes 
Code Meaning 
1 Blow out/flat tire, (specify blow out/flat, location/make) 
2 Stalled engine 
3 Disabling vehicle failure (e.g. wheel fell off) Specify: 
4 Non-disabling vehicle problem (e.g., hood flew up) Specify: 
5 Poor road conditions (Puddle, pothole, ice, etc.) Specify: 
6 Traveling too fast for conditions 
7 Jackknife Event 
8 Other cause of control loss (specify) 
9 Unknown cause of control loss 
10 Over the lane line on left side of travel lane 
11 Over the lane line on right side of travel lane 
12 Off the edge of the road on the left side 
13 Off the edge of the road on the right side 
14 End departure 
15 Turning left at intersection 
16 Turning right at intersection 
17 Crossing over (passing through) intersection 
18 This vehicle decelerating 
19 Unknown travel direction 
50 Other vehicle stopped 
51 Traveling in same direction with low steady speed 
52 Traveling in same direction while decelerating 
53 Traveling in same direction with higher speed 
54 Traveling in opposite direction 
55 In crossover 
56 Backing 
59 Unknown travel direction of other motor vehicle in lane 
60 From adjacent lane (same direction) - over left lane line 
61 From adjacent lane (same direction -over right lane line 
62 From opposite direction-over left lane line 
63 From opposite direction -over right lane line 
64 From parking lane 
65 From crossing street, turning into same direction 
66 From crossing street, across path 
67 From crossing street, turning into opposite direction 
68 From crossing street, intended path not known 
70 From driveway, turning into same direction 
71 From driveway, across path 
72 From driveway, turning into opposite direction 

LTCCS Analytical User's Manual CrashAssessment Data Set • 79 


Variable Definitions and Codes - CrashAssessment Data Set 

73 From driveway, intended path not known 
74 From entrance to limited access highway 
78 Encroachment by other vehicle-details unknown 
80 Pedestrian in roadway 
81 Pedestrian approaching roadway 
82 Pedestrian-unknown location 
83 Pedal cyclist or other non-motorist in roadway (specify): 
84 Pedal cyclist or other non-motorist approaching roadway (specify) 
85 Pedal cyclist or other non-motorist-unknown location (specify) 
87 Animal in roadway 
88 Animal approaching roadway 
89 Animal - unknown location 
90 Object in roadway 
91 Object approaching roadway 
92 Object - unknown location 
98 Other (specify) 
99 Unknown 
100 Cargo Shift 
125 Not involved first harmful event 

Critical Precrash Event Categories 

Definition: This variable groups the individual attributes of the Critical Precrash Event into 
categories. These categories are helpful in deciding the critical precrash event. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic; police report, driver interviews, witness interviews, and vehicle 
inspection results. It should be noted, however, that this may be a subjective decision based on 
the preponderance of available evidence. 

Cross Reference: Derived from CrashAssessment.ACRCriticalEvent. Derived from 
Overview.OVECriticalEvent. 

Variable Name: CriticalEventCat 

Attribute Codes 

Code Meaning 

1 This vehicle loss of control 
2 This vehicle traveling 
3 Other motor vehicle in lane 
4 Other motor vehicle encroaching into lane 
5 Pedestrian, pedacyclist, or other nonmotorist 
6 Object or animal 
7 Other (specify) 
8 Unknown 
9 This vehicle not involved in first harmful event 


Critical Reason For The Critical Event 

Definition: This variable establishes the critical reason for the occurrence of the critical event. 
The critical reason is the immediate reason for this event and is often the last failure in the causal 

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Variable Definitions and Codes - CrashAssessment Data Set 

chain (i.e. closest in time to the critical precrash event). Although the critical reason is an 
important part of the description of crash events, it is not the cause of the crash nor does it imply 
the assignment of fault. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews, and vehicle 
inspection results. It should be noted, however, that this may be a subjective decision based on 
the preponderance of available evidence. 

Cross Reference: Elaborates on CrashAssessment.ReasonCat. Identical to 
Overview.OVEReason. 

Variable Name: ACRReason 

Attribute Codes 

Code Meaning 

0 Critical event not coded to this vehicle 

100 Sleep, that is, actually asleep 

101 Heart attack or other physical impairment of the ability to act 

108 Other critical non-performance (specify) 

109 Unknown critical non-performance 

110 Inattention (i.e., daydreaming) 

111 Internal distraction 

112 External distraction 

113 Inadequate surveillance (e.g., failed to look, looked but did not see) 

118 Other recognition error (specify) 

119 Unknown recognition error 

120 Too fast for conditions to be able to respond to unexpected actions of other 

road users (specify) 

121 Too slow for traffic stream 

122 Misjudgment of gap or other's speed 

123 Following too closely to respond to unexpected actions 

124 False assumption of other road user's actions 

125 Illegal maneuver 

126 Failure to turn on headlamps 

127 Inadequate evasive action, e.g. braking only, not braking and steering 

128 Aggressive driving behavior 

138 Other decision error (specify) 

139 Unknown decision error 

140 Too fast for curve/turn 

141 Panic/Freezing 

142 Overcompensation 

143 Poor directional control e.g., failing to control vehicle with skill ordinarily 

expected 

148 Other performance error (specify) 

149 Unknown performance error 

199 Type of driver error unknown 

200 Tires/wheels failed 

201 Brakes failed 

202 Steering failed 

203 Cargo shifted 

204 Trailer attachment failed 

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Variable Definitions and Codes - CrashAssessment Data Set 

205 Suspension failed 

206 Lights failed 

207 Vehicle related vision obstructions 

208 Body, doors, hood failed 

209 Jackknifed 

298 Other vehicle failure (specify) 

299 Unknown vehicle failures 

500 Signs/signals missing 

501 Signs/signals erroneous/defective 

502 Signs/signals inadequate 

503 View obstructions by roadway design/furniture 

504 View obstructed by other vehicles 

505 Road design - roadway geometry (e.g., ramp curvature) 

506 Road design - sight distance 

507 Road design - other 

508 Maintenance problems (potholes, deteriorated road edges, etc.) 

509 Slick roads (low friction road surface due to ice, loose debris, any other 

cause) 

518 Other highway-related condition (specify) 

521 Rain, snow 

522 Fog 

523 Wind gust 

528 Other weather-related condition (specify) 

530 Glare 

531 Blowing debris 

538 Other sudden change in ambience (specify) 

540 Degraded braking capability 

541 Transmission/engine failure 

999 Unknown reason for critical event 

Critical Reason Categories 

Definition: This variable groups the attributes for the variable Critical Reason for the Critical 
Event variable into categories. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic; police report, driver interviews, witness interviews, and vehicle 
inspection results. It should be noted, however, that this may be a subjective decision based on 
the preponderance of available evidence. 

Cross Reference: Derived from CrashAssessment.ACRReason. Derived from 
Overview.OVEReason. 

Variable Name: ReasonCat 

Attribute Codes 

Code Meaning 

0 No Driver Error 
1 Physical Driver Factor 
2 Driver Recognition Factor 
3 Driver Decision Factor 


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Variable Definitions and Codes - CrashAssessment Data Set 

4 Driver Performance Factor 
5 Vehicle Related Factor 
6 Environment - Highway 
7 Environment - Weather 
99 Unknown Reason 

Attempted Avoidance Maneuver 

Definition: This variable documents the driver’s actions initiated in response to the realization of 
impending danger. Attempted avoidance maneuvers are movements/actions initiated by the 
subject driver, within the crucial crash envelope, in response to a critical precrash event. 
Attempted avoidance maneuvers occur after the driver has realization of an impending danger. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Identical to Overview.OVEAvoidance. 

Variable Name: ACRAvoidance 

Attribute Codes 

Code Meaning 

0 No driver present 
1 No avoidance maneuver 
2 Braking (no lockup) 
3 Braking (lockup) 
4 Braking (lockup unknown) 
5 Releasing brakes 
6 Steering left 
7 Steering right 
8 Braking and steering left 
9 Braking and steering right 
10 Accelerating 
11 Accelerating and steering left 
12 Accelerating and steering right 
98 Other action (specify) 
99 Unknown 

Pre-Impact Stability 

Definition: This variable focuses upon this vehicle’s dynamics after the critical event. The 
purpose of this variable is to assess the stability of the vehicle after the critical event. The stability 
of the vehicle prior to an avoidance action is not considered except in the following situation: A 
vehicle that is out of control (e.g. yawing clockwise) prior to an avoidance maneuver is coded 
“Other vehicle loss of control” only if an avoidance action was taken in response to an impending 
danger. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Identical to Overview.OVEStability. 

LTCCS Analytical User's Manual CrashAssessment Data Set • 83 


Variable Definitions and Codes - CrashAssessment Data Set 

Variable Name: ACRStability 

Attribute Codes 

Code Meaning 

0 No driver present 
1 Tracking 
2 Skidding longitudinally->rotation less than 30 degrees 
3 Skidding laterally->clockwise rotation 
4 Skidding laterally->counterclockwise rotation 
8 Other vehicle loss-of-control (specify) 
9 Pre-crash stability unknown 


Pre-Impact Location 

Definition: This variable reports the location of the subject vehicle at the point where its pre-
impact stability is determined. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Identical to Overview.OVELocation. 

Variable Name: ACRLocation 

Attribute Codes 

Code Meaning 

0 No driver present 
1 Stayed in original travel lane 
2 Stayed on roadway but left original travel lane 
3 Stayed on roadway, not known if left original travel lane 
4 Departed roadway 
5 Remained off roadway 
6 Returned to roadway 
7 Entered roadway 
9 Unknown 


Right-Of-Way? 

Definition: This variable establishes vehicle right-of-way characteristics, from a legal 
perspective, for the subject vehicle. Specifically, did this vehicle have the right-of-way? 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Identical to Overview.OVERightOfWay. 

Variable Name: ACRRightOfWay 

LTCCS Analytical User's Manual CrashAssessment Data Set • 84 


Variable Definitions and Codes - CrashAssessment Data Set 

Attribute Codes 
Code1 
2 
88 
99 
Meaning 
Yes 
No 
Not applicable 
Unknown 
Crash Type 

Definition: This variable is used in categorizing the collisions of drivers involved in crashes. A 
collision is defined here as the first harmful event in a crash between a vehicle and some object, 
accompanied by property damage or human injury. The object may be another vehicle, a person, 
an animal, a fixed object, the road surface, or the ground. If the first collision is a rollover, the 
impact is with the ground or road surface. The collision may also involve plowing into soft ground, 
if severe deceleration results in damage or injury. A road departure without damage or injury is 
not defined as a collision. This variable encompasses the “Configuration” variable, which is a 
component of this variable. Cases where the crash type is “No Impact” include fire and 
immersion. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Elaborates on CrashAssessment.AccidentCat. Identical to 
Overview.OVECrashCode. Elaborates on Overview.OVEAccidentType. 

Variable Name: CrashCode 

Attribute Codes 

Code Meaning 

0 No Impact 
1 Right roadside departure, drive off road 
2 Right roadside departure, control/traction loss 
3 Right roadside departure; avoid collision with vehicle, pedestrian, animal 
4 Right roadside departure, specific other 
5 Specifics Unknown 
6 Left roadside departure, drive off road 
7 Left roadside departure, control/traction loss 
8 Left roadside departure; avoid collision with vehicle, pedestrian, animal 
9 Left roadside departure, specifics other 
10 Specifics Unknown 
11 Forward Impact, parked vehicle 
12 Forward impact, stationary object 
13 Forward Impact, pedestrian/animal 
14 End Departure 
15 Forward Impact, Specifics Other 
16 Specifics Unknown 
20 Rear-end: Stopped 
21 Rear-end: Stopped, Straight 
22 Rear-end: Stopped, Left 
23 Rear-end: Stopped, Right 

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Variable Definitions and Codes - CrashAssessment Data Set 

24 Rear-end: Slower 
25 Slower, Going Straight 
26 Rear-end: Slower, Going Left 
27 Rear-end: Slower, Going Right 
28 Rear-end: Decelerating (Slowing) 
29 Rear-end: Decelerating (Slowing), Going Straight 
30 Rear-end: Decelerating (Slowing), Going Left 
31 Rear-end: Decelerating (Slowing), Going Right 
32 Rear-end: Specifics Other 
33 Rear-end: Specifics Unknown 
34 Forward Impact: Control/Traction Loss 
35 Forward Impact: Control/Traction Loss 
36 Forward Impact: Control/Traction Loss 
37 Forward Impact: Control/Traction Loss 
38 Forward Impact: Avoid Collision with Vehicle. 
39 Forward Impact: Avoid Collision with Vehicle 
40 Forward Impact: Avoid Collision with Object 
41 Forward Impact: Avoid Collision with Object 
42 Forward Impact: Specifics Other 
43 Forward Impact: Specifics Unknown 
44 Sideswipe/Angle: Straight Ahead on Left 
45 Sideswipe/Angle: Straight Ahead on Left/Right 
46 Sideswipe/Angle: Changing Lanes to the Right 
47 Sideswipe/Angle: Changing Lanes to the Left 
48 Sideswipe/Angle: Specifics Other 
49 Sideswipe/Angle: Specifics Unknown 
50 Head-On: Lateral Move (Left/Right) 
51 Head-On: Lateral Move (Going Straight) 
52 Head-On: Specifics Other 
53 Head-On: Specifics Unknown 
54 Forward Impact: Control/Traction Loss 
55 Forward Impact: Control/Traction Loss 
56 Forward Impact: Control/Traction Loss 
57 Forward Impact: Control/Traction Loss 
58 Forward Impact: Avoid Collision with Vehicle 
59 Forward Impact: Avoid Collision with Vehicle 
60 Forward Impact: Avoid Collision with Object 
61 Forward Impact: Avoid Collision with Object 
62 Forward Impact: Specifics Other 
63 Forward Impact: Specifics Unknown 
64 Sideswipe/Angle: Lateral Move (Left/Right) 
65 Sideswipe/Angle: Lateral Move (Going Straight) 
66 Sideswipe/Angle: Specifics Other 
67 Sideswipe/Angle: Specifics Unknown 
68 Turn Across Path: Initial Opposite Directions (Left/Right) 
69 Turn Across Path: Initial Opposite Directions (Going Straight) 
70 Turn Across Path: Initial Same Directions (Turning Right) 
71 Turn Across Path: Initial Same Directions (Going Straight) 
72 Turn Across Path: Initial Same Directions (Turning Left) 

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Variable Definitions and Codes - CrashAssessment Data Set 

73 Turn Across Path: Initial Same Directions (Going Straight) 
74 Turn Across Path: Specifics Other 
75 Turn Across Path: Specifics Unknown 
76 Turn Into Same Direction (Turning Left) 
77 Turn Into Same Direction (Going Straight) 
78 Turn Into Same Direction (Turning Right) 
79 Turn Into Same Direction (Going Straight) 
80 Turn Into Opposite Directions (Turning Right) 
81 Turn Into Opposite Directions (Going Straight) 
82 Turn Into Opposite Directions (Turning Left) 
83 Turn Into Opposite Directions (Going Straight) 
84 Turn Into Path: Specifics Other 
85 Turn Into Path: Specifics Unknown 
86 Straight Paths: Striking from the Right 
87 Straight Paths: Struck on the Right 
88 Straight Paths: Striking from the Left 
89 Straight Paths: Struck on the Left 
90 Straight Paths: Specifics Other 
91 Straight Paths: Specifics Unknown 
92 Backing, Etc.: Backing Vehicle 
93 Backing, Etc.: Other Vehicle or Object 
98 Backing, Etc.: Other Crash Type 
99 Backing, Etc.: Unknown Crash Type 

Crash Configuration 

Definition: This variable is used in categorizing the collisions of drivers involved in crashes. A 
collision is defined here as the first harmful event in a crash between a vehicle and some object, 
accompanied by property damage or human injury. The object may be another vehicle, a person, 
an animal, a fixed object, the road surface, or the ground. If the first collision is a rollover, the 
impact is with the ground or road surface. The collision may also involve plowing into soft ground, 
if severe deceleration results in damage or injury. A road departure without damage or injury is 
not defined as a collision. This variable is part of the larger variable “Crash Type.” The “Crash 
Type” variable is actually broken down into three components: the crash category, the crash 
configuration, and the accident type. This variable only deals with the configuration of the crash. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Derived from CrashAssessment.CrashCode. Identical to 
Overview.OVEAccidentType. Derived from Overview.OVECrashCode. 

Variable Name: AccidentCat 

Attribute Codes 

Code Meaning 

1 Right Roadside Departure 
2 Rear-End 
3 Head-On 
4 Turn Across Path 
5 Straight Paths 

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Variable Definitions and Codes - CrashAssessment Data Set 

6 Same Trafficway Opposite Directions - Sideswipe/Angle 
7 Left Roadside Departure 
8 Same Trafficway Same Direction - Forward Impact 
9 Same Trafficway Opposite Directions - Forward Impact 
10 Turn Into Path 
11 Single Driver - Forward Impact 
12 Same Trafficway Same Direction - Sideswipe/Angle 
13 Miscellaneous 
99 Backing, Etc.: Unknown Crash Type 

Jackknife 

Definition: This variable documents the presence/absence of a jackknife for this vehicle. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. 

Cross Reference: Identical to Overview.OVEJackKnife. Derived from 
JackknifeAssessments.AJKType. 

Variable Name: ACRJackknife 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Cargo Shift 

Definition: This variable documents the presence/absence of a cargo shift for this vehicle. 

Source: Determined by Case Reviewer using all available information inputs. Primary sources 
include the scaled schematic, police report, driver interviews, witness interviews and vehicle 
inspection results. Input from the truck inspection staff can also be utilized to code this variable. 

Cross Reference: Identical to Overview.OVECargoShift. Derived from 
CargoShiftAssessments.ACSType. 

Variable Name: ACRCargoshift 
Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual CrashAssessment Data Set • 88 


Variable Definitions and Codes - CrashDiscussion Data Set 

CrashDiscussion Data Set 

The CrashDiscussion data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the CrashDiscussion data set with other vehicle level data sets. This 
data set also contains the following variables: 

Case Summary 

Definition: The Case Summary is intended to provide a detailed description of the crash 
sequence including precrash vehicle movement patterns and driver precrash actions. In addition 
to describing crash events for each vehicle/driver, the summary is intended to provide a detailed 
accounting of all causal-related information for this vehicle/driver. This includes describing the 
critical precrash event, the critical reason for the critical event, and all critical event associated 
factors. 

Source: Written by Case Reviewer utilizing all available case information. 

Cross Reference: Related to Crash.Summary, values are not identical in all cases due to 
Crash.Summary being crash specific and CrashDiscussion.Discussion is vehicle specific. 

Variable Name: Discussion 

Attribute Codes 

Code Meaning 

* Detailed description of the crash 
LTCCS Analytical User's Manual CrashDiscussion Data Set • 89 


Variable Definitions and Codes - DMVViolation Data Set 

DMVViolation Data Set 

The DMVViolation data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber and DriverNumber. CaseID and VehicleNumber should be used to merge the 
DMVViolation data set with vehicle level data sets. DriverNumber is used to uniquely identify 
each driver, however, since a driver can have more than one violation and be involved in more 
than one crash, this variable does not uniquely identify each record. This data set also contains 
the following variables: 

Source: The source for all variables in this table is the Commercial Driver's License Information 
System (CDLIS). CDLIS maintains identification data for each commercial driver registered in the 
fifty states and the District of Columbia. It acts as the central point of access for driver information 
maintained by a driver's state of record. For more information go to 
http://www.aamva.org/drivers/drv_automatedsystemscdlis.asp. 

Cross Reference: This table is related to the following variables in the GeneralVehicle data set: 
CMVViolations, NonCMVViolations, TotalViolations, PrevViolations. 

License State 

Definition: This variable identifies the State in which the driver’s (driving) license was issued. 

Cross Reference: Congruent with IntvwDrDriver.IDRLicenseState, values will differ due to 
Interview vs. Researcher determined values. Related to GeneralVehicle.ZipCode. 

Variable Name: LicState 

Attribute Codes 
Code* 
Meaning 
Two-letter state abbreviation 
Citation Date 

Definition: This variable identifies the date that the driver received a citation for a particular 
violation. 

Variable Name: CitDate 

Attribute Codes 
Code* 
Meaning 
Date (in YYYY-MM-DD format) 
Conviction Date 

Definition: This variable identifies the date that the driver was convicted of a particular violation. 
Variable Name: ConvDate 
Attribute Codes 

Code Meaning 

* Date (in YYYY-MM-DD format) 
LTCCS Analytical User's Manual DMVViolation Data Set • 90 


Variable Definitions and Codes - DMVViolation Data Set 

ACD Code 

Definition: This variable represents Department Of Motor Vehicle (DMV) violation codes. 
Variable Name: ACDcode 

Attribute Codes 
Code* 
Meaning 
DMV code 
ACD Detail 

Definition: This variable is a 5-digit code that provides further detail of the ACD code. 
Variable Name: ACDdetail 
Attribute Codes 

Code Meaning 

* DMV code 
Violation Description 

Definition: This variable is a description of each violation and corresponds to the ACD Code. 
Variable Name: ViolDescription 
Attribute Codes 

Code Meaning 

* Text description of each violation 
LTCCS Analytical User's Manual DMVViolation Data Set • 91 


Variable Definitions and Codes - DriverAssessment Data Set 

DriverAssessment Data Set 

The DriverAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverAssessment data set with other vehicle level data sets. This 
data set also contains the following variables: 

Was This Driver’s Sight Line To The Other Vehicle Clear? 

Definition: This variable establishes the driver’s sight line to the other vehicle in terms of being 
clear or being obstructed in some manner. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the driver interview; secondary sources include scaled scene schematic, scene 
measurement log, interviews with other vehicle occupants, witnesses, other drivers, surrogate 
interviews with family members/friends, and the police report. 

Cross Reference: Congruent with IntvwDrPerception.LineClear, values will differ due to 
Interview vs. Researcher determined values. In conjunction with DriverAssessment.Obscured, 
DriverAssessment.Focused, and DriverRecognitionDistraction.ADDSurveillance matches 
Overview.OVESurveillance. 

Variable Name: SightLine 

Attribute Codes 
Code Meaning 
1 Yes 
2 No, view obstructed by roadway curvature or grade 
3 No, view obstructed by roadside appurtenance 
4 No, view obstructed by intervening vehicle 
7 Not applicable 
8 Other (specify) 
9 Unknown 

Was This Driver’s View Of The Other Vehicle Obscured? 

Definition: This variable establishes the driver’s view of the other vehicle in terms of having a 
clear view or having a view that is obscured in some manner. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the driver interview; secondary sources include scaled scene schematic, scene 
measurement log, interviews with other vehicle occupants, witnesses, other drivers, surrogate 
interviews with family members/friends, and the police report. 

Cross Reference: Congruent with IntvwDrPerception.ViewObscured, values will differ due to 
Interview vs. Researcher determined values. In conjunction with DriverAssessment.SightLine, 
DriverAssessment.Focused, and DriverRecognitionDistraction.ADDSurveillance matches 
Overview.OVESurveillance. 

Variable Name: Obscured 

LTCCS Analytical User's Manual DriverAssessment Data Set • 92 


Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code Meaning 
1 Yes, obscured by solar glare 
2 Yes, obscured by headlight glare 
3 Yes, obscured by other glare (specify) 
4 Yes, obscured by dark (nighttime) viewing conditions 
5 No 
7 Not applicable 
8 Yes, obscured by other condition (specify) 
9 Unknown 

Was This Driver Required To Stop Prior To Crash Occurrence? 

Definition: This variable establishes if this driver is required to stop prior to entering an 
intersection, initiating a turn, or prior to the crash. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the driver interview; secondary sources include interviews with other vehicle 
occupants, witnesses, other drivers, surrogate interviews with family members/friends, and the 
police report. 

Cross Reference: Related to IntvwDrPerception.Stopped, values will differ in part due to 
Interview vs. Researcher determined values. Related to DriverDecisionAggression.RanLights. 

Variable Name: StopRequired 

Attribute Codes 

Code Meaning 

1 Yes, traffic control device (TCD) 
2 Yes, other reason (specify) 
3 Yes, yield right of way requirement 
5 No 
7 No driver present 
9 Unknown 

Period Of Time Stopped Prior To Entering Intersection And/Or Initiating Turn 

Definition: This variable establishes the period of time the driver was stopped prior to entering 
an intersection, initiating a turn, or prior to the crash. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the driver interview; secondary data sources include interviews with other vehicle 
occupants, witnesses, other drivers, surrogate interviews with family members/friends, and the 
police report. 

Cross Reference: Related to IntvwDrPerception.Stopped, values will differ in part due to 
Interview vs. Researcher determined values. 

Variable Name: TimeStopped 

LTCCS Analytical User's Manual DriverAssessment Data Set • 93 


Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes--* 

Code Meaning 

0 Traveling at constant velocity 
1 Decelerated, did not stop 
2 Rolling stop prior to proceeding 
3 Stopped < 1 second prior to proceeding 
4 Stopped 1-2 seconds prior to proceeding 
5 Stopped 3-5 seconds prior to proceeding 
6 Stopped more then 5 seconds prior to proceeding 
7 No driver present 
8 Not required to stop 
9 Unknown 


After Checking For Traffic, Did This Driver Focus On Intended Turn Destination Or Other 
Location? 

Definition: This variable documents the circumstance where the driver focuses on an 
extraneous location after initially checking for approaching traffic. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the driver interview; secondary sources include interviews with other vehicle 
occupants, witnesses, other drivers, surrogate interviews with family members/friends, and the 
police report. 

Cross Reference: Congruent with IntvwDrPerception.FocusTurnIntended, values will differ due 
to Interview vs. Researcher determined values. In conjunction with DriverAssessment.SightLine, 
DriverAssessment.Obscured, and DriverRecognitionDistraction.ADDSurveillance matches 
Overview.OVESurveillance. 

Variable Name: Focused 

Attribute Codes 
Code1 
Meaning 
Yes 
2 No 
7 
9 
Not applicable 
Unknown 

Sleep Related To Work Schedule 

Definition: This variable establishes whether or not the driver’s sleep pattern is primarily related 
to his/her work schedule. (This variable was originally an attribute choice under the variable 
“Driver’s Hours of Main Sleep Related To.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (1 “Work Schedule”), values will differ 
due to Interview vs. Researcher determined values. 

Variable Name: ADRWorkSchedule 

LTCCS Analytical User's Manual DriverAssessment Data Set • 94 


Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Sleep Related To Social Schedule 

Definition: This variable establishes whether or not the driver’s sleep pattern is related to a 
social schedule. (This variable was originally an attribute choice under the variable “Driver’s 
Hours Of Main Sleep Related To.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (2 “Social Schedule”), values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: SocialSchedule 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Sleep Related To Personal Problems 

Definition: This variable establishes whether or not the driver’s sleep pattern is primarily related 
to a set of personal problems. (This variable was originally an attribute choice under the variable 
“Driver’s Hours Of Main Sleep Related To.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (3 “Personal Problems”), values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: PersonalProblems 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Sleep Related To Family Problems 

Definition: This variable establishes whether or not the driver’s sleep pattern is related to 
problems of other family members or to interpersonal relationships between the driver and other 
family members. (This variable was originally an attribute choice under the variable “Driver’s 
Hours Of Main Sleep Related To.”) 

LTCCS Analytical User's Manual DriverAssessment Data Set • 95 


Variable Definitions and Codes - DriverAssessment Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (4 “Family Problems”), values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: FamilyProblems 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Sleep Related To Illness 

Definition: This variable establishes whether or not the driver’s sleep pattern is related to illness. 
The illness may involve either the driver or other family members. (This variable was originally an 
attribute choice under the variable “Driver’s Hours Of Main Sleep Related To.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (5 “Illness”), values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: Illness 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

No Driver Present 

Definition: This variable establishes whether or not there was a driver present in the driver’s 
seated position at the time of the crash. (This variable was originally an attribute choice under the 
variable “Driver’s Hours Of Main Sleep Related To.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Variable Name: NoDriverPresent 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 96 


Variable Definitions and Codes - DriverAssessment Data Set 

Sleep Related To Other Factor 

Definition: This variable establishes whether or not the driver’s sleep pattern is related to a 
factor not described by the other sleep pattern variables. (This variable was originally an attribute 
choice under the variable “Driver’s Hours Of Main Sleep Related To” and was the “Other 
(specify):” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (6 “Other (specify)”), values will differ 
due to Interview vs. Researcher determined values. 

Variable Name: ADROtherFactor 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Sleep Related To Unknown Factor 

Definition: This variable establishes whether or not the driver’s sleep pattern was related to an 
unknown factor. (This variable was originally an attribute choice under the variable “Driver’s 
Hours Of Main Sleep Related To” and was the “Unknown” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, interviews with 
other occupants, and interviews with friends of the driver. 

Cross Reference: Congruent with IntvwDrSleep.RelateTo (99 “Unknown”), values will differ due 
to Interview vs. Researcher determined values. 

Variable Name: UnknownFactor 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Alcohol Use 

Definition: This variable establishes the presence of alcohol for this driver. 

Source: Police report, medical report, other official records, OR the field observation of the 
NASS Researcher. 

Cross Reference: Congruent with GeneralVehicle.PARAlcoholPresent, values differ due to 
Police Report vs. Researcher determined values. Elaborates on Overview.OVEAlcohol. 

Variable Name: AlcoholUse 

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Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code Meaning 

00 No alcohol use 
90 Test performed 
91 AC test performed, results positive 
92 Field observation of NASS researcher 
93 AC test performed, results negative 
95 Test refused 
96 None given 
97 AC test performed, results unknown 
98 No driver present 
99 Unknown 

Alcohol Test 

Definition: This variable records the results of an alcohol test (either blood alcohol test or 
Breathalyzer test). 

Source: Police report, medical report, other official records, OR the field observation of the 
NASS Researcher. 

Cross Reference: Congruent with GeneralVehicle.PARAlcoholTestResult, values differ due to 
Police Report vs. Researcher determined values. 

Variable Name: AlcoholTest 

Attribute Codes 
Code Meaning 
0-500 Test result value [percent (times 100)] 
8887 No driver present 
9998 None 
9999 Unknown 

Source Of BAC Test Result 

Definition: This variable documents the source of the BAC test results.
Source: Police report, medical report, carrier records, or other official records. 
Cross Reference: Congruent with GeneralVehicle.PARTestSource, values differ due to Police 


Report vs. Researcher determined values.


Variable Name: TestSource 

Attribute Codes 
Code Meaning 
0 
1 
2 
5 
6 
No BAC test/Not applicable 
Police reported 
Company reported 
Lay Coroner 
No driver present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 98 


Variable Definitions and Codes - DriverAssessment Data Set 

8 Other (specify) 
9 Unknown 

Time Delay (Between Crash And BAC Test) 

Definition: This variable documents the time delay between the crash and the time the BAC test 
is administered. 

Source: Police report, medical report, carrier records, or other official records. 

Cross Reference: Congruent with GeneralVehicle.PARTestDelay, values differ due to Police 
Report vs. Researcher determined values. 

Variable Name: TestDelay 
Attribute Codes 

Code Meaning 

0000-9999 Time delayed (in HHMM format) 

9797 Not applicable 
9889 No Test 
9898 No BAC test 
9999 Unknown 
Illegal Drug Use 

Definition: This variable documents the administration of a drug test for this driver. 

Source: Police report, medical report, carrier records, or other official records. 

Cross Reference: Congruent with GeneralVehicle.PARDrugsPresent, values differ due to Police 
Report vs. Researcher determined values. 

Variable Name: DrugTest 

Attribute Codes 

Code Meaning 

0 No drug use 
5 Test performed, results negative 
7 Not applicable 
91 Test performed, results positive 
95 Test refused 
96 None given 
97 Test performed, results unknown 
98 No driver present 
99 Unknown 

Driver Fatigue 

Definition: This variable assesses driver fatigue at the time of the crash. The assessment is 
based on an evaluation of the driver’s current and preceding sleep schedules, current and 
preceding work schedules, and a variety of other fatigue-related factors including recreational and 
non-work activities. 

LTCCS Analytical User's Manual DriverAssessment Data Set • 99 


Variable Definitions and Codes - DriverAssessment Data Set 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source here is the driver interview, however, due to the inaccuracies inherent in these data, 
the Case Reviewer should compare driver responses with other data sources including log book 
entries, time stamped fuel and toll receipts, carrier records, and other interview sources to 
determine the veracity of the driver responses. The final assessment of fatigue involvement is 
made from all of these sources and may include the on-site assessments of the NASS 
Researcher. 

Cross Reference: Elaborates on Overview.DriverFatigue. Related to the IntvwDrFatigue data 
set, values will differ in part due to Interview vs. Researcher determined values. 

Variable Name: Fatigue 

Attribute Codes 
Code Meaning 
0 
1 
8 
9 
Driver not fatigued 
Driver fatigued 
No driver present 
Unknown 

Was The Driver Upset Prior To The Crash? 

Definition: This variable establishes whether or not the driver was upset prior to the crash and 
the specific reason for this emotional state. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: Related to DriverRecognitionDistraction.Inattention. Related to 
IntvwDrAttention.Concerns, values will differ in part due to Interview vs. Researcher determined 
values. In conjunction with DriverAssessment.Hurrying, DriverAssessment.Emotional, 
DriverAssessment.KnewVehicle, DriverAssessment.KnewRoad, 
DriverAssessment.WorkPressureCount, and DriverAssessment.ComfortCount matches 
Overview.EmotionExperience. 

Variable Name: Upset 

Attribute Codes 

Code Meaning 

0 Not upset 
1 Preceding argument with spouse 
2 Preceding argument with other family member 
3 Preceding argument with other individual (specify) 
4 Related to financial problems 
5 Related to family problems 
7 No driver present 
8 Other source (specify) 
9 Unknown 

LTCCS Analytical User's Manual DriverAssessment Data Set • 100 


Variable Definitions and Codes - DriverAssessment Data Set 

Was The Driver In A Hurry Prior To Crash? 

Definition: This variable establishes if the driver was in a hurry prior to crash occurrence. 
Assessments of this type are reflected in the driver’s precrash driving behavior (e.g. speeding, 
sudden starts/stops, weaving in and out of traffic, etc.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: Congruent with IntvwDrPerception.HurryPrior, values will differ due to 
Interview vs. Researcher determined values. Related to DriverDecisionAggression data set. In 
conjunction with DriverAssessment.Upset, DriverAssessment.Emotional, 
DriverAssessment.KnewVehicle, DriverAssessment.KnewRoad, 
DriverAssessment.WorkPressureCount, and DriverAssessment.ComfortCount matches 
Overview.EmotionExperience. 

Variable Name: Hurrying 

Attribute Codes 
Code Meaning 
0 Not in a hurry 
1 Due to work-related schedule 
2 Late for business appointment 
3 Late for social appointment 
4 Late for start of work shift/start of school classes 
5 Normal driving pattern 
7 No driver present 
8 Other reason (specify) 
9 Unknown 

Other Emotional Factors 

Definition: This variable establishes if there were other emotional factors relevant to this driver’s 
precrash behavior. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: In conjunction with DriverAssessment.Upset, DriverAssessment.Hurrying, 
DriverAssessment.KnewVehicle, DriverAssessment.KnewRoad, 
DriverAssessment.WorkPressureCount, and DriverAssessment.ComfortCount matches 
Overview.EmotionExperience. 

Variable Name: Emotional 

Attribute Codes 
Code Meaning 
0 No other emotional factors 
1 Driver clinically depressed 
2 Driver has a diagnosed psychosis (specify) 

LTCCS Analytical User's Manual DriverAssessment Data Set • 101 


Variable Definitions and Codes - DriverAssessment Data Set 

7 No driver present 
8 Other factors (specify) 
9 Unknown 

Vehicle Familiarity 

Definition: This variable establishes driver familiarity with the vehicle being operated at the time 
of the crash. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: Congruent with IntvwDrCondition.Familarity, values will differ due to Interview 
vs. Researcher determined values. In conjunction with DriverAssessment.Upset, 
DriverAssessment.Hurrying, DriverAssessment.Emotional, DriverAssessment.KnewRoad, 
DriverAssessment.WorkPressureCount, and DriverAssessment.ComfortCount matches 
Overview.EmotionExperience. 

Variable Name: KnewVehicle 

Attribute Codes 

Code Meaning 

1 First time driving this vehicle 
2 Had driven this vehicle 2-5 times in the past six months 
3 Had driven this vehicle 6-10 times in the past six months 
4 Had driven this vehicle more than 10 times in the past six months 
7 No driver present 
9 Unknown 

Roadway Familiarity 

Definition: This variable establishes the driver’s familiarity with the approach to the crash site. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: Related to IntvwDrTrip.FrequentRoute, values will differ due to road vs. route 
as well as Interview vs. Researcher determined values. In conjunction with 
DriverAssessment.Upset, DriverAssessment.Hurrying, DriverAssessment.Emotional, 
DriverAssessment.KnewVehicle, DriverAssessment.WorkPressureCount, and 
DriverAssessment.ComfortCount matches Overview.EmotionExperience. 

Variable Name: KnewRoad 

Attribute Codes 

Code Meaning 

1 First time driving on this roadway 
2 Rarely drives on this roadway 
3 Drives on this roadway once per month 

LTCCS Analytical User's Manual DriverAssessment Data Set • 102 


Variable Definitions and Codes - DriverAssessment Data Set 

4 Drives on this roadway several times per month 
5 Drives on this roadway weekly 
6 Drives on this roadway daily 
7 No driver present 
8 Other frequency (specify) 
9 Unknown 

Work Pressure Factors Count 

Definition: This variable is a count of the number of work pressure variables. This includes 
attributes from the original variable “Driver Under Work-Related Pressure,” which were broken out 
into individual variables. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Cross Reference: Computed from the following variables in the DriverAssessment data set: 
NewPosition, ShippingDeadlines, EXPWorkSchedule, Quotas, ExtraLoads, Demoted, 
SelfInducedIllegal, SelfInducedOther, OtherPressure. In conjunction with 
DriverAssessment.Upset, DriverAssessment.Hurrying, DriverAssessment.Emotional, 
DriverAssessment.KnewVehicle, DriverAssessment.KnewRoad, and 
DriverAssessment.ComfortCount matches Overview.EmotionExperience. 

Variable Name: WorkPressureCount 

Attribute Codes 
Code0-6 
7 
99 
Meaning 
Count of work pressure attributes 
No driver present 
Unknown 

Learning New Position 

Definition: This variable establishes whether or not the driver was under pressure from his/her 
employer as a result of learning a new position in his/her primary work place. (This variable was 
originally an attribute choice under the variable “Driver Under Work-Related Pressure.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: NewPosition 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 103 


Variable Definitions and Codes - DriverAssessment Data Set 

Production/Shipping Deadlines 

Definition: This variable establishes whether or not the driver experienced work pressure as a 
result of being under time-related pressures associated with production/shipping deadlines. (This 
variable was originally an attribute under the variable “Driver Under Work-Related Pressure.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: ShippingDeadline 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Work Schedule Pressure 

Definition: This variable establishes whether or not the driver was experiencing any pressure on 
the job as it relates to his/her work schedule. (This variable was originally an attribute choice 
under the variable “Driver Under Work-Related Pressure.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: EXPWorkSchedule 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Additional Production/Sales Requirements 

Definition: This variable establishes whether or not the driver experienced any work pressure 
with regard to additional production or sales requirements. (This variable was originally an 
attribute choice under the variable “Driver Under Work-Related Pressure.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: Quotas 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 104 


Variable Definitions and Codes - DriverAssessment Data Set 

Forced To Accept Loads With Little Or No Advance Notice 

Definition: This variable establishes whether or not the driver was under pressure from his/her 
employer to accept loads with little or no advance notice. (This variable was originally an attribute 
choice under the variable “Driver Under Work-Related Pressure.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: ExtraLoads 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Demoted 

Definition: This variable establishes whether or not the driver had recently been forced to accept 
a demotion and/or pay decrease. (This variable was originally an attribute choice under the 
variable “Driver Under Work-Related Pressure.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: Demoted 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Self Induced Work Pressure - Illegal 

Definition: This variable establishes whether or not the driver experienced self-induced work 
pressure, as opposed to employer-induced pressure. The driver was pressuring himself to do 
things that are considered illegal (e.g. a truck driver continuing to drive even though he knows he 
is over his allowed driving hours). (This variable was originally an attribute choice under the 
variable “Work-Related Pressure” in the electronic data system, but was not found on the paper 
version of the Crash Event Assessment Form.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: SelfInducedIllegal 

LTCCS Analytical User's Manual DriverAssessment Data Set • 105 


Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Self Induced Work Pressure - Other 

Definition: This variable establishes whether or not the driver experienced self-induced work 
pressure, as opposed to employer-induced pressure. (This variable was originally an attribute 
choice under the variable “Work-Related Pressure” in the electronic data system, but was not 
found on the paper version of the Crash Event Assessment Form.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: SelfInducedOther 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Work Pressure 

Definition: This variable establishes whether or not the driver experienced any work-related 
pressure that was not captured under other work-pressure variables. (This variable was originally 
an attribute choice under the variable “Driver Under Work-Related Pressure” and was the “Other 
(specify)” attribute choice). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: OtherPressure 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Comfort Count 

Definition: This variable establishes the total number of attributes coded for the variable “Other 
Factor Types,” which had to do with a driver’s comfort with traffic conditions and the vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

LTCCS Analytical User's Manual DriverAssessment Data Set • 106 


Variable Definitions and Codes - DriverAssessment Data Set 

Cross Reference: Computed from the following variables in the DriverAssessment data set: 
TrafficDensity, TrafficSpeed, ADRTrafficFlow, VehicleLoad, OtherComfortFactor. In conjunction 
with DriverAssessment.Upset, DriverAssessment.Hurrying, DriverAssessment.Emotional, 
DriverAssessment.KnewVehicle, DriverAssessment.KnewRoad, and 
DriverAssessment.WorkPressureCount matches Overview.EmotionExperience. 

Variable Name: ComfortCount 

Attribute Codes 
Code0-6 
Meaning 
Count of comforts coded 
7 
9 
No driver present 
Unknown 

Uncomfortable With Surrounding Traffic Densities 

Definition: This variable establishes whether or not the driver was uncomfortable with the 
surrounding traffic densities. The densities are usually very high as might be associated with rush 
hour traffic. (This variable was originally an attribute choice under the variable “Other Factor 
Types,” which had to do with driver experience.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Variable Name: TrafficDensity 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Uncomfortable With General Traffic Speeds 

Definition: This variable establishes whether or not the driver was uncomfortable with the 
general speed of surrounding traffic. The discomfort is typically associated with the driver feeling 
that surrounding traffic is moving too fast. (This variable was originally an attribute choice under 
the variable “Other Factor Types,” which had to do with driver experience.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Variable Name: TrafficSpeed 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 107 


Variable Definitions and Codes - DriverAssessment Data Set 

Uncomfortable with General Traffic Flow 

Definition: This variable establishes whether or not the driver was uncomfortable with the 
general flow of surrounding traffic. (This variable was originally an attribute choice under the 
variable “Other Factor Types,” which had to do with driver experience.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Variable Name: ADRTrafficFlow 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Uncomfortable With Some Aspect Of Vehicle/Load 

Definition: This variable establishes whether or not the driver was uncomfortable with either the 
vehicle or the load. (This variable was originally an attribute choice under the variable “Other 
Factor Types,” which had to do with driver experience.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: Congruent with the following variables from IntvwDrCondition: Vehicle, Load, 
Both. These values will differ due to Interview vs. Researcher determined values. 

Variable Name: VehicleLoad 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Comfort Factor 

Definition: This variable establishes whether or not the driver had an “other” 
experience/exposure factor that was relevant to the crash that was not described by the other 
comfort variables. (This variable was originally an attribute choice under the variable “Other 
Factor Types,” was the “Other (specify)” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Variable Name: OtherComfortFactor 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 108 


Variable Definitions and Codes - DriverAssessment Data Set 

Under Pressure To Accept Loads 

Definition: This variable documents the circumstance where the driver is under some pressure 
from the carrier to accept additional loads. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: In conjunction with DriverAssessment.WorkFatigueCount and 
DriverAssessment.OtherPressureCount matches Overview.CarrierEmployer. 

Variable Name: LoadPressure 

Attribute Codes 
Code Meaning 
0 Not under pressure to accept loads 
1 Accept unscheduled loads on scheduled trip 
2 Accept additional loads on unscheduled trip 
3 Accept unscheduled loads on short notice scheduled trip 
4 Accept additional loads when over allowable driving hours 
7 Not applicable 
8 Other load factors (specify) 
9 Unknown 

Work Fatigue Factors Count 

Definition: This variable is a count of the number of work fatigue-related variables. This includes 
attributes from the original variable “Under Pressure to Operate Even if Fatigued,” which were 
broken out into individual variables. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Cross Reference: Computed from the following variables in the DriverAssessment data set: 
ScheduledExtensions, RotatingShift, UnscheduledExtensions, NoApplicableFatigue, 
OtherFatigue. Related to IntvwDrFatigue data set, values will differ in part due to Interview vs. 
Researcher determined values. In conjunction with DriverAssessment.LoadPressure and 
DriverAssessment.OtherPressureCount matches Overview.CarrierEmployer. 

Variable Name: WorkFatigueCount 

Attribute Codes 

Code Meaning 

0-6 Count of other fatigue attributes 
7 Not applicable 
9 Unknown 

LTCCS Analytical User's Manual DriverAssessment Data Set • 109 


Variable Definitions and Codes - DriverAssessment Data Set 

Scheduled Loads Require Extended Hours 

Definition: This variable establishes whether or not the driver experienced work pressure due to 
his/her carrier scheduling trips in a manner that requires extended work shifts to complete. (This 
variable was originally an attribute under the variable “Under Pressure to Operate Even if 
Fatigued.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Variable Name: ScheduledExtensions 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Scheduled Trips Require Rotating Shift 

Definition: This variable establishes whether or not the driver experienced work pressure due to 
his/her carrier scheduling trips in a manner that requires the driver to work rotating shift schedules 
with an associated rotating sleep pattern. (This variable was originally an attribute choice under 
the variable “Under Pressure to Operate Even if Fatigued.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Variable Name: RotatingShift 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Unscheduled Loads Require Extended Hours 

Definition: This variable establishes whether or not the driver experienced work pressure due to 
his/her carrier pressing the driver to accept unscheduled loads/trips that require the driver to 
operate while fatigued. (This variable was originally an attribute under the variable “Under 
Pressure to Operate Even if Fatigued.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Variable Name: UnscheduledExtensions 

LTCCS Analytical User's Manual DriverAssessment Data Set • 110 


Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Not Applicable – Under Pressure To Operate Even If Fatigued 

Definition: This variable was originally an attribute choice under the variable “Under Pressure to 
Operate Even if Fatigued” (a carrier-related variable). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Variable Name: NoApplicableFatigue 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Fatigue-Related Factors 

Definition: This variable establishes whether or not the driver experienced any pressure by the 
carrier to operate even if fatigued when that pressure did not fit under other fatigue variables. 
(This variable was originally an attribute choice under the variable “Under Pressure to Operate 
Even If Fatigued” and was the “Other (specify)” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interviews. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Variable Name: OtherFatigue 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Pressure Count 

Definition: This variable establishes the number of “other” pressures specified in the “Other 
Work Pressure” variable. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Cross Reference: Computed from the following variables in the DriverAssessment data set: 
ShortNoticeTrips, FillInTrips, UnpaidLoading, VariableCompensation, NoApplicableRelations, 

LTCCS Analytical User's Manual DriverAssessment Data Set • 111 


Variable Definitions and Codes - DriverAssessment Data Set 

OtherRelations. In conjunction with DriverAssessment.LoadPressure and 
DriverAssessment.WorkFatigueCount matches Overview.CarrierEmployer.


Variable Name: OtherPressureCount 

Attribute Codes 
Code0-6 
7 
9 
Meaning 
Count of other pressure attributes 
Not applicable 
Unknown 

Required To Accept Short Notice Trips 

Definition: This variable establishes whether or not the driver was required by his/her carrier to 
accept short notice trips. (This variable was originally an attribute choice under variable “Other 
Relation Factor Types.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Cross Reference: Related to IntvwCarrier.AdvanceNotice, values will differ in part due to 
Interview vs. Researcher determined values. Related to IntvwDrFatigue.ADVNotice, values will 
differ in part due to Interview vs. Researcher determined values. 

Variable Name: ShortNoticeTrips 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Required To Fill In For Other Drivers 

Definition: This variable establishes whether or not the driver was under pressure by his/her 
carrier to fill in for other drivers (i.e. perform extra work) when other drivers are absent. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: FillInTrips 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverAssessment Data Set • 112 


Variable Definitions and Codes - DriverAssessment Data Set 

Required To Complete Unpaid Loading 

Definition: This variable establishes whether or not the driver was required by his/her carrier to 
complete uncompensated loading/unloading activities. (This variable was originally an attribute 
choice under variable “Other Relation Factor Types.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Cross Reference: Congruent with IntvwDrFatigue.Compensated, values will differ due to 
Interview vs. Researcher determined values. Congruent with IntvwCarrier.LoadUnloadComp (0 
“Not compensated”), values will differ due to Interview vs. Researcher determined values. 

Variable Name: UnpaidLoading 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Variable Compensation Package 

Definition: This variable establishes whether or not the driver is compensated in accordance 
with a variable compensation package such that the driver is not paid on a consistent basis. (This 
variable was originally an attribute choice under variable “Other Relation Factor Types.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: VariableCompensation 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Not Applicable – Other Relation Factor Types 

Definition: This variable was originally an attribute choice under the variable “Other Relation 
Factor Types” (a carrier-related variable). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: NoApplicableRelations 

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Variable Definitions and Codes - DriverAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Carrier Relation Factors 

Definition: This variable establishes whether or not there were other carrier relation factors not 
captured in other carrier relation variables that may have had a bearing on crash occurrence. 
(This variable was originally an attribute choice under the variable “Other Relation Factor Types,” 
and was the “Other (specify)” attribute choice). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the carrier interview. Secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/ friends, and the police report. 

Variable Name: OtherRelations 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 

DriverDecisionAggression Data Set 

The DriverDecisionAggression data set contains the variables CaseID, PSU, PSUStrat, 
RATWeight, and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in 
this data set and should be used to merge the DriverDecisionAggression data set with other 
vehicle level data sets. This data set also contains the following variables: 

Cross Reference: This table is related to DriverAssessment.Hurrying. 

Traveling Too Fast For Conditions 

Definition: This variable documents reasons given by the driver for traveling at his/her pre-crash 
travel speed. This variable is only relevant in the circumstance where the driver had been 
assessed as traveling too fast for conditions. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: Related to IntvwDrAggression data set, values will differ in part due to 
Interview vs. Researcher determined values. In conjunction with 
DriverDecisionAggression.Tailgating and DriverDecisionAggression.Misjudgment matches 
Overview.OVESpeed. 

Variable Name: Speeding 

Attribute Codes 
Code Meaning 
0 
1 
2 
3 
7 
9 
Not traveling too fast factors 
Keeping up with traffic 
Did not realize caution required 
Other reason (specify) 
No driver present 
Unknown 

Following Too Closely 

Definition: This variable documents reasons given by the driver for traveling with less than the 
recommended gap interval to traffic forward of the driver’s position. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: Related to IntvwDrAggression data set, values will differ in part due to 
Interview vs. Researcher determined values. Related to IntvwDrPerception.GapDistance, values 
will differ in part due to Interview vs. Researcher determined values. In conjunction with 
DriverDecisionAggression.Speeding and DriverDecisionAggression.Misjudgment matches 
Overview.OVESpeed. 

Variable Name: Tailgating 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 

Attribute Codes 
Code Meaning 
0 Not following too closely factors 
1 Rush hour, heavy traffic 
2 Keeping up with traffic 
3 Did not realize too close 
4 Always drive at this gap distance 
7 No driver present 
8 Other (specify) 
9 Unknown 

Misjudgment Of Gap Distance Or Velocity Of Other Vehicle 

Definition: This variable documents the involvement of a decision error in which the subject 
driver either misjudges the gap distance to the other vehicle or misjudges the velocity of the other 
vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: In conjunction with DriverDecisionAggression.Speeding and 
DriverDecisionAggression.Tailgating matches Overview.OVESpeed. 

Variable Name: Misjudgment 

Attribute Codes 

Code Meaning 

0 No misjudgment factors 
1 Misjudgment of gap distance 
2 Misjudgment of velocity of other vehicle 
3 Misjudgment of both factors 
7 No driver present 
9 Unknown 

Other Vehicle Approaching From This Driver’s 

Definition: This variable establishes the direction from which the misjudged vehicle was 
approaching this driver’s position. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Variable Name: Approach 

Attribute Codes 

Code Meaning 

0 No misjudgment factors 
1 Left 
2 Right 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 

3 Forward direction (i.e. 170-190 degrees opposed) 
4 Left forward direction (i.e. 120-169 degrees opposed) 
5 Right forward direction (i.e. 191-240 degrees opposed) 
6 Rear 
7 No driver present 
9 Unknown 

Police Reported Travel Speed 

Definition: This variable documents the travel speed of this driver as reported on the police 
report. 

Source: Police report only. 

Cross Reference: Identical to GeneralVehicle.GVETravelSpeed. Congruent with 
TruckExterior.TEXSpeed when applicable, values will differ due to Police Report vs. Vehicle’s 
data recorder. 

Variable Name: ADATravelSpeed 
Attribute Codes 

Code Meaning 

0-900 Travel speed (km/hr) 
9999 Unknown 

Posted Speed Limit 

Definition: This variable establishes the pre-crash roadway’s posted speed limit. 

Source: Primary sources are scene inspection or statutory law; a secondary source is the police 
report. 
Cross Reference: Identical to GeneralVehicle.GVEPostedSpeed. 
Variable Name: ADAPostedSpeed 
Attribute Codes 

Code Meaning 

0-900 Posted speed limit (km/hr) 
9999 Unknown 

False Assumption Of Other Road User’s Actions 

Definition: This variable identifies false assumptions on the part of this driver with respect to 
other driver’s actions or intended actions. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: In conjunction with DriverDecisionAggression.Evasion, 
DriverDecisionAggression.ADAOtherFactor, DriverDecisionAggression.ManeuverCount matches 
Overview.OVEDecision. 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 117 


Variable Definitions and Codes - DriverDecisionAggression Data Set 
Variable Name: Assumption 

Attribute Codes 
Code Meaning 
0 No false assumption factors 
1 Assumed that other driver would merge without stopping 
2 Assumed that other driver would turn without stopping 
3 Assumed that other driver would continue to proceed 
4 Assumed that other driver would yield right-of-way 
7 No driver present 
8 Other false assumption (specify) 
9 Unknown 

Inadequate Evasive Action 

Definition: This variable establishes inadequate evasive actions on the part of this driver. This 
variable does not deal with legal requirements and the final assessment may be subjective. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include interviews with other vehicle occupants, 
witnesses, other drivers, surrogate interviews with family members/friends, and the police report. 

Cross Reference: In conjunction with DriverDecisionAggression.Assumption, 
DriverDecisionAggression.ADAOtherFactor, DriverDecisionAggression.ManeuverCount matches 
Overview.OVEDecision. 

Variable Name: Evasion 

Attribute Codes 

Code Meaning 

0 No inadequate evasive action factors 
1 Insufficient steering inputs 
2 Insufficient braking inputs 
3 Combination of insufficient steering and braking inputs 
4 No driver present 
8 Other inadequate evasive action (specify) 
9 Unknown 

Other Decision Factors 

Definition: This variable establishes decision factors relevant to this crash that are not described 
in the other decision variables. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Cross Reference: In conjunction with DriverDecisionAggression.Assumption, 
DriverDecisionAggression.Evasion, DriverDecisionAggression.ManeuverCount matches 
Overview.OVEDecision. 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 
Variable Name: ADAOtherFactor 

Attribute Codes 
Code Meaning 
0 No other decision factors 
1 Crossed with obstructed view 
2 Turned with obstructed view 
3 Stopped when not required 
4 Proceeded with insufficient clearance 
5 Turned without signaling 
7 No driver present 
8 Other decision error (specify) 
9 Unknown 

Illegal Maneuver Count 

Definition: This variable establishes the total number of illegal maneuvers conducted by this 
driver. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Cross Reference: Computed from the following variables in the DriverDecisionAggression data 
set: CrossedLine, Undertaking, WrongTurnLane, IllegalUTurn, RanLights, WrongWay, 
OtherManeuver. In conjunction with DriverDecisionAggression.Assumption, 
DriverDecisionAggression.Evasion, DriverDecisionAggression.ADAOtherFactor matches 
Overview.OVEDecision. 

Variable Name: ManeuverCount 

Attribute Codes 

Code Meaning 

0-6 Count of maneuver aspects present 
7 No driver present 
9 Unknown 

Crossed Full Barrier Lines While Passing 

Definition: This variable documents whether or not the driver crosses full barrier lines to 
execute, or while executing, a passing maneuver. (This variable was originally an attribute choice 
under the variable “Illegal Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: CrossedLine 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Passed On Right (Drive Off Pavement To Pass) 

Definition: This variable documents whether or not the driver drives off the travel lane(s) to pass 
on the right (i.e. driver moves on to shoulder area to execute the passing maneuver). (This 
variable was originally an attribute choice under the variable “Illegal Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: Undertaking 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Turned From Wrong Lane 

Definition: This variable documents whether or not the driver executes a turn from the wrong 
lane (i.e. driver turns left from the right lane or turns right from the left lane of a multi-lane 
roadway). (This variable was originally an attribute choice under the variable “Illegal Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: WrongTurnLane 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Initiated Illegal U-Turn 

Definition: This variable documents whether or not the driver initiates a U-turn in an area where 
these turns are not permitted. (This variable was originally an attribute choice under the variable 
“Illegal Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: IllegalUTurn 

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Variable Definitions and Codes - DriverDecisionAggression Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Failed To Stop For TCD 

Definition: This variable documents whether or not the driver does not stop for a displayed red 
traffic signal phase or does not stop for a stop sign. (This variable was originally an attribute 
choice under the variable “Illegal Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Cross Reference: Related to DriverAssessment.StopRequired. Related to 
IntvwDrPerception.Stopped, values will differ in part due to Interview vs. Researcher determined 
values. 

Variable Name: RanLights 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Drove Wrong Way On One-Way Road 

Definition: This variable documents whether or not the driver travels the wrong way on a one-
way roadway. (This variable was originally an attribute choice under the variable “Illegal 
Maneuver.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: WrongWay 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Illegal Maneuver 

Definition: This variable documents whether or not the driver initiates an illegal maneuver that is 
not described in the other illegal maneuver variables. (This variable was originally an attribute 
choice under the variable “Illegal Maneuver” and was the “Other Illegal Maneuver (specify):” 
attribute.) 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 121 


Variable Definitions and Codes - DriverDecisionAggression Data Set 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the police report and the driver interview. Secondary sources include interviews 
with other vehicle occupants, witnesses, other drivers, and surrogate interviews with family 
members/friends. 

Variable Name: OtherManeuver 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Aggression Count 

Definition: This variable establishes the total number of aggressive behaviors exhibited by this 
driver. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Cross Reference: Computed from the following variables in the DriverDecisionAggression data 
set: SpeedingBehavior, TailgatingBehavior, Weaving, LightViolation, RapidAcceleration, Honking, 
Flashing, ObsceneGestures, BlockingOthers, OtherAggression. Elaborates on 
Overview.Aggression. Related to IntvwDrAggressiveDriving data set, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: AggressionCount 

Attribute Codes 

Code Meaning 

0-10 Count of aggression attributes present 
77 No driver present 
99 Unknown 

Speeding 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of exceeding the speed limit by a minimum of 5 MPH (8.05 kmph) and the vehicle’s speed 
has a bearing on subsequent crash events. A degree of caution is required when assigning this 
element. Specifically, to be considered as a valid aggressive driving element, the act of speeding 
should pose some risk to surrounding traffic. If, for example, the driver is speeding in a stream of 
traffic, this act poses a risk to surrounding traffic. On the other hand, a driver who is speeding late 
at night, on a rural highway with no surrounding traffic, does not pose a risk to others and should 
not be considered as driving aggressively. (This variable was originally an attribute choice under 
the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: SpeedingBehavior 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 122 


Variable Definitions and Codes - DriverDecisionAggression Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Tailgating 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of traveling in close proximity to a vehicle forward of his/her position. While the exact gap 
interval that qualifies for this assignment will vary with the velocity of the traffic stream, the 
interval should be sufficiently small/short to preclude the following vehicle/driver from executing a 
safe stop in an emergency stop circumstance. (This variable was originally an attribute choice 
under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: TailgatingBehavior 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Weaving In And Out Of Traffic 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of weaving in and out of traffic to pass slower-moving vehicles. While drivers engaging in 
this activity typically exceed the speed limit, speeding is not required for valid use of this element. 
(This variable was originally an attribute choice under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: Weaving 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Intentional Violation Of Traffic Control Devices 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of violating a displayed red signal phase or stop sign. Deliberate violation of a yield sign is 
captured under the “Other Aggressive Behavior” variable. (This variable was originally an 
attribute choice under the variable “Aggressive Driving Behavior.”) 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 123 


Variable Definitions and Codes - DriverDecisionAggression Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: LightViolations 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Accelerated Rapidly/Stopped Suddenly 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of engaging in these activities in a repeating fashion (i.e. braking late for a TCD and then 
accelerating rapidly away from that location and repeating this behavior at the next TCD). This 
behavior pattern is often associated with being in a hurry or being late for some engagement. 
(This variable was originally an attribute choice under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: RapidAcceleration 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Honking Horn 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of repeatedly honking the vehicle’s horn at surrounding traffic to gain a time/space 
advantage. (This variable was originally an attribute choice under the variable “Aggressive 
Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: Honking 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 124 


Variable Definitions and Codes - DriverDecisionAggression Data Set 

Flashing Lights 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of repeatedly flashing the vehicle’s lights in an attempt to have traffic forward of this 
vehicle’s position move either to the right or left so that this vehicle can “get by.” (This variable 
was originally an attribute choice under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: Flashing 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Obscene Gestures 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of making obscene gestures at other drivers. (This variable was originally an attribute 
choice under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: ObsceneGestures 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Obstructing The Path Of Others 

Definition: This variable documents whether or not the driver exhibited aggressive behavior in 
terms of using his/her vehicle to physically obstruct the path of another vehicle by pulling in front 
of that vehicle. In addition to physically blocking the path, the subject driver typically slows to 
force the other driver to take evasive action (e.g. steering, and/or braking actions). (This variable 
was originally an attribute choice under the variable “Aggressive Driving Behavior.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: BlockingOthers 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 125 


Variable Definitions and Codes - DriverDecisionAggression Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Aggressive Behavior 

Definition: This variable documents whether or not the driver exhibited aggressive behavior that 
is not described by the other aggressive driving behavior variables. (This variable was originally 
an attribute choice under the variable “Aggressive Driving Behavior” and was the “Other (specify)” 
attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: OtherAggression 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Reasons For Aggressive Driving Behavior 

Definition: This variable establishes the reason for the aggressive driving behaviors reported in 
the corresponding variables. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, the driver interview, interviews with witnesses, other vehicle 
occupants, and other drivers. Secondary sources include surrogate interviews with family 
members/friends. 

Variable Name: AggressionReason 

Attribute Codes 

Code Meaning 

0 No aggressive driving behaviors 
1 Anger 
2 Frustration 
3 Always drive this way 
77 No driver present 
88 Other (specify) 
99 Unknown 

LTCCS Analytical User's Manual DriverDecisionAggression Data Set • 126 


Variable Definitions and Codes - DriverDrugs Data Set 

DriverDrugs Data Set 

The DriverDrugs data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and DrugName uniquely identify each record in this 
data set. CaseID and VehicleNumber should be used to merge the DriverDrugs data set with 
vehicle level data sets. This data set also contains the following variables: 

Cross Reference: This table elaborates on Crash.AnyDrugsCrash. 

Drug Name 

Definition: Name of drug(s) used – includes illegal drugs, over-the-counter drugs, and 
prescription drugs. 

Source: For illegal drugs: Police report, medical report, carrier reports, or other official records. 
For over-the-counter and prescription drugs: The primary source for this information is the driver 
interviews. The information, however, may also be obtained from other occupants in the vehicle 
and from surrogate interviews. When appropriate, official records including police reports and 
medical reports may also be used. 

Variable Name: DrugName 

Attribute Codes 

Code Meaning 

* Actual drug name 
Drug Type 

Definition: This variable establishes the type of drug specified in the Drug Name variable. 

Source: For illegal drugs: Police report, medical report, carrier reports, or other official records. 
For over-the-counter and prescription drugs: The primary source for this information is the driver 
interviews. The information, however, may also be obtained from other occupants in the vehicle 
and from surrogate interviews. When appropriate, official records including police reports and 
medical reports may also be used. 

Cross Reference: Congruent with IntvwDrHealth.OverCounter and IntvwDrHealth.Prescribed, 
values will differ due to Interview vs. Researcher determined values. 

Variable Name: DrugType 

Attribute Codes 

Code Meaning 

1 Prescription 
2 Over the counter 
3 Illegal 


Driver Reported 

Definition: This variable establishes whether or not the drug usage was reported by the driver. 

Source: Driver interview. 

Variable Name: DriverReported 

LTCCS Analytical User's Manual DriverDrugs Data Set • 127 


Variable Definitions and Codes - DriverDrugs Data Set 

Attribute Codes 
Code1 
2 
Meaning 
Yes 
No 

Drug Test Results 

Definition: This variable documents the results of drug tests performed on the driver. 

Source: Police report, medical report, carrier records, or other official records. 

Variable Name: TestResult 

Attribute Codes 
Code Meaning 

0.00-1000.00 Test result (usually nanograms/ml) 
99995 None given 
99996 Legal drug, test results not collected 
99997 Drug test positive, measured value unknown 
99998 Trace 
99999 Unknown 

LTCCS Analytical User's Manual DriverDrugs Data Set • 128 


Variable Definitions and Codes - DriverHealth Data Set 

DriverHealth Data Set 

The DriverHealth data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverHealth data set with other vehicle level data sets. This data 
set also contains the following variables: 

Corrected Vision Level 

Definition: This variable documents the driver’s corrected vision level. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include driver and surrogate interviews. 

Cross Reference: Congruent with IntvwDrHealth.CorrectedVision, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ADHCorrectedVision 

Attribute Codes 
Code0-9000 
Meaning 
Corrected vision 
9797 
9898 
9999 
No test given 
Not applicable 
Unknown 

Number Of Illness Factors 

Definition: This variable documents the number of illness factors coded for this driver. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Cross Reference: Computed from the following variables in the DriverHealth data set: 
HeartAttack, EpilepticSeizure, OtherSeizure, DiabeticBlackout, OtherBlackout, ColdFlu, 
OtherIllness. In conjunction with DriverHealth.LegallyBlind, DriverHealth.Myopic, 
DriverHealth.Hyperopic, DriverHealth.Glaucoma, DriverHealth.ColorBlind, 
DriverHealth.Astigmatic, DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches 
Overview.DriverPhysical. 

Variable Name: IllnessFactorCount 

Attribute Codes 
Code0-6 
7 
9 
Meaning 
Count of illness factors present 
No driver present 
Unknown 
Heart Attack 

Definition: This variable establishes whether or not the driver experienced a heart attack prior to 
the crash event. (This variable was originally an attribute choice under the variable “Illness.”) 

LTCCS Analytical User's Manual DriverHealth Data Set • 129 


Variable Definitions and Codes - DriverHealth Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: HeartAttack 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Seizure (Epilepsy Related) 

Definition: This variable establishes whether or not the driver experienced an epileptic seizure 
prior to the crash event. (This variable was originally an attribute choice under the variable 
“Illness.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: EpilepticSeizure 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Seizure (Other Source) 

Definition: This variable establishes whether or not the driver experienced a seizure prior to the 
crash event that was not related to epilepsy. (This variable was originally an attribute choice 
under the variable “Illness.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: OtherSeizure 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Blackout (Diabetes Related) 

Definition: This variable establishes whether or not the driver experienced a blackout prior to the 
crash event and that this event can be traced to a medically diagnosed diabetic condition (e.g. 
driver blacks out as a result of insulin shock). (This variable was originally an attribute choice 
under the variable “Illness.”) 

LTCCS Analytical User's Manual DriverHealth Data Set • 130 


Variable Definitions and Codes - DriverHealth Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: DiabeticBlackout 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Blackout (Other Source) 

Definition: This variable establishes whether or not the driver experienced a blackout prior to the 
crash event and that this event is not related to a diabetic condition. (This variable was originally 
an attribute choice under the variable “Illness.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: OtherBlackout 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Severe Cold/Flu Symptoms 

Definition: This variable establishes whether or not the driver is operating the vehicle while 
experiencing severe cold/flu symptoms which influence his/her driving performance. (This 
variable was originally an attribute choice under the variable “Illness.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: ColdFlu 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Illness 

Definition: This variable establishes whether or not the driver experiences an illness or physical 
symptoms that are not described under the other illness variables. (This variable was originally an 
attribute choice under the variable “Illness” and was the “Other (specify)” attribute.) 

LTCCS Analytical User's Manual DriverHealth Data Set • 131 


Variable Definitions and Codes - DriverHealth Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the police report, medical report, driver interviews, other occupant interviews, and 
witness interviews. Secondary sources include surrogate interviews with family members/friends. 

Variable Name: OtherIllness 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Normal Vision 

Definition: This variable establishes whether or not the driver wears corrective lenses to 
improve vision levels. (This variable was originally an attribute choice under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (9 “Not Applicable”), values 
will differ due to Interview vs. Researcher determined values. 

Variable Name: NormalVision 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Legal Blindness 

Definition: This variable establishes whether or not the driver has been diagnosed with an 
uncorrected vision level that exceeds 20/2800. (This variable was originally an attribute choice 
under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (part of 9 “Other”), values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.Myopic, DriverHealth.Hyperopic, 
DriverHealth.Glaucoma, DriverHealth.ColorBlind, DriverHealth.Astigmatic, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: LegallyBlind 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - DriverHealth Data Set 

Myopic (Near-sighted) Condition 

Definition: This variable establishes whether or not the driver wears corrective lenses (including 
contact lenses) to compensate for a near-sighted condition. (This variable was originally an 
attribute choice under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (1 “Myopic (near sighted)”), 
values will differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Hyperopic, 
DriverHealth.Glaucoma, DriverHealth.ColorBlind, DriverHealth.Astigmatic, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: Myopic 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Hyperopic (Far-sighted) Condition 

Definition: This variable establishes whether or not the driver wears corrective lenses (including 
contact lenses) to compensate for a far-sighted condition. (This variable was originally an 
attribute choice under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (2 “Hyperopic (far sighted)”), 
values will differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Myopic, 
DriverHealth.Glaucoma, DriverHealth.ColorBlind, DriverHealth.Astigmatic, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: Hyperopic 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Glaucoma 

Definition: This variable establishes whether or not the driver has been diagnosed as having 
glaucoma. (This variable was originally an attribute choice under the variable “Vision.”) 

LTCCS Analytical User's Manual DriverHealth Data Set • 133 


Variable Definitions and Codes - DriverHealth Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (part of 9 “Other”), values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Myopic, 
DriverHealth.Hyperopic, DriverHealth.ColorBlind, DriverHealth.Astigmatic, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: Glaucoma 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Color Blind 

Definition: This variable establishes whether or not the driver has been diagnosed as being 
color blind. (This variable was originally an attribute choice under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (part of 9 “Other”), values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Myopic, 
DriverHealth.Hyperopic, DriverHealth.Glaucoma, DriverHealth.Astigmatic, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: ColorBlind 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Astigmatism 

Definition: This variable establishes whether or not the driver has been diagnosed as having 
astigmatism. (This variable was originally an attribute choice under the variable “Vision.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (part of 9 “Other”), values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Myopic, 

LTCCS Analytical User's Manual DriverHealth Data Set • 134 


Variable Definitions and Codes - DriverHealth Data Set 

DriverHealth.Hyperopic, DriverHealth.Glaucoma, DriverHealth.ColorBlind, 
DriverHealth.OtherVision, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: Astigmatic 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Vision Problem 

Definition: This variable establishes whether or not the driver has a vision problem that is not 
described by the other vision variables. (This variable was originally an attribute choice under the 
variable “Vision” and was the “Other (specify)” attribute.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (part of 9 “Other”), values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverHealth.IllnessFactorCount, DriverHealth.LegallyBlind, DriverHealth.Myopic, 
DriverHealth.Hyperopic, DriverHealth.Glaucoma, DriverHealth.ColorBlind, 
DriverHealth.Astigmatic, and DriverHealth.OtherFactorCount matches Overview.DriverPhysical. 

Variable Name: OtherVision 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Unknown Vision Problem 

Definition: This variable establishes whether or not the driver was coded as “Vision problem 
unknown.” This code is used when there is insufficient information to determine if the driver has a 
vision related problem/deficiency. (This variable was originally an attribute choice under the 
variable “Vision” and was the “Unknown” attribute.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.VisionCondition (9 “Unknown”), values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: UnknownVision 

LTCCS Analytical User's Manual DriverHealth Data Set • 135 


Variable Definitions and Codes - DriverHealth Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Number Of Other Physical Factors 

Definition: This variable documents the number of other physical factors coded to this driver. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Computed from the following variables in the DriverHealth data set: 
NoFactors, HearingImpairment, Prosthesis, Paraplegia, StrenuousRecreation, OtherStrenuous, 
SleepApnea, OtherFactorPhysical. In conjunction with DriverHealth.IllnessFactorCount, 
DriverHealth.LegallyBlind, DriverHealth.Myopic, DriverHealth.Hyperopic, DriverHealth.Glaucoma, 
DriverHealth.ColorBlind, DriverHealth.Astigmatic, and DriverHealth.OtherVision matches 
Overview.DriverPhysical. 

Variable Name: OtherFactorCount 

Attribute Codes 

Code Meaning 

0-6 Count of other factors present 
7 No driver present 
9 Unknown 

No Other Physical Factors 

Definition: This variable documents whether or not there were no other physical factors coded 
to this driver. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Variable Name: NoFactors 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Hearing Impairment 

Definition: This variable establishes whether or not the driver has a diagnosed hearing 
impairment. (This variable was originally an attribute choice under the variable “Other Physical 
Factors.”) 

LTCCS Analytical User's Manual DriverHealth Data Set • 136 


Variable Definitions and Codes - DriverHealth Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrHealth.Hearing, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: HearingImpairment 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Prosthesis 

Definition: This variable establishes whether or not the driver is wearing a prosthesis. (This 
variable was originally an attribute choice under the variable “Other Physical Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Related to IntvwCarrier.ConditionCovered (2 “Prosthesis”), values will differ in 
part due to Interview vs. Researcher determined values. 

Variable Name: Prosthesis 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Paraplegia 

Definition: This variable establishes whether or not the driver has paralysis of the lower limbs. 
(This variable was originally an attribute choice under the variable “Other Physical Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Variable Name: Paraplegia 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - DriverHealth Data Set 

Strenuous Recreation Activities 

Definition: This variable establishes whether or not the driver participates in strenuous 
recreational activities during the seven day interval preceding the crash. (This variable was 
originally an attribute choice under the variable “Other Physical Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrFatigue.RecreationalStrenuous, values will differ due 
to Interview vs. Researcher determined values. 

Variable Name: StrenuousRecreation 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Strenuous Non-Work Activities 

Definition: This variable establishes whether or not the driver participates/engages in strenuous 
non-work activities (e.g. household chores) during the seven day interval preceding the crash. 
(This variable was originally an attribute choice under the variable “Other Physical Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Cross Reference: Congruent with IntvwDrFatigue.OtherStrenuous, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: StrenuousNonWork 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Sleep Apnea 

Definition: This variable establishes whether or not the driver has an obstructive sleep apnea 
disorder. (This variable was originally an attribute choice under the variable “Other Physical 
Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

LTCCS Analytical User's Manual DriverHealth Data Set • 138 


Variable Definitions and Codes - DriverHealth Data Set 

Cross Reference: Congruent with IntvwDrHealth.ApneaHas and 
IntvwDrHealth.ApneaBeingTreated, values will differ due to Interview vs. Researcher determined 
values. 

Variable Name: SleepApnea 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Physical Factor 

Definition: This variable establishes whether or not the driver has a relevant physical factor that 
is not described in the other physical factor variables. (This variable was originally an attribute 
choice under the variable “Other Physical Factors” and was the “Other (specify)” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
sources include the driver interview, carrier records, medical records, and the police report. 
Secondary sources include other occupant interviews and surrogate interviews with family 
members/friends. 

Variable Name: OtherFactorPhysical 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

DriverRecognitionDistraction Data Set 

The DriverRecognitionDistraction data set contains the variables CaseID, PSU, PSUStrat, 
RATWeight, and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in 
this data set and should be used to merge the DriverRecognitionDistraction data set with other 
vehicle level data sets. This data set also contains the following variables: 

Source: All variables in this table are determined by Case Reviewer using all available 
information inputs. The primary data source is the driver interview; secondary sources include 
interviews with other vehicle occupants, witnesses, other drivers, surrogate interviews with family 
members/friends, and the police report. 

Inattention 

Definition: This variable documents driver inattention (i.e. focusing on internal thought 
processes) and the nature of the involved thought processes. 

Cross Reference: Related to DriverAssessment.Upset. Related to IntvwDrAttention.Concerns, 
values will differ in part due to Interview vs. Researcher determined values. In conjunction with 
DriverRecognitionDistraction.Conversation, DriverRecognitionDistraction.ADDRecognition, 
DriverRecognitionDistraction.InteriorDistractionCount, and ExteriorDistractionCount matches 
Overview.OVERecognition. 

Variable Name: Inattention 

Attribute Codes 
Code Meaning 
0 No Inattention Factors 
1 Personal problem 
2 Family problem 
3 Financial problem 
4 Preceding argument 
5 Future event (vacation, wedding, etc.) 
7 No driver present 
8 Other (specify) 
9 Unknown 
Conversation 

Definition: This variable documents driver participation in conversation. The conversation can 
be associated with a variety of sources including conversing with passengers, talking on a cell 
phone, or talking on a CB radio. 

Cross Reference: Related to IntvwDrAttention.OnPhone, values will differ in part due to 
Interview vs. Researcher determined values. Related to IntvwDrAttention.TalkingOnPhone and 
IntvwDrAttention.TalkingOnCB, values will differ in part due to Interview vs. Researcher 
determined values. In conjunction with DriverRecognitionDistraction.Inattention, 
DriverRecognitionDistraction.ADDRecognition, 
DriverRecognitionDistraction.InteriorDistractionCount, and ExteriorDistractionCount matches 
Overview.OVERecognition. 

Variable Name: Conversation 

LTCCS Analytical User's Manual DriverRecognitionDistraction Data Set • 140 


Variable Definitions and Codes - DriverRecognitionDistraction Data Set 
Attribute Codes 

Code Meaning 
0 Not conversing 
1 Conversing with passenger 
2 Talking on phone 
3 Talking on CB radio 
7 No driver present 
8 Other (specify) 
9 Unknown 

Nature Of Discussion 

Definition: This variable documents the nature of the conversation the driver is involved in 
during the pre-crash phase. 

Cross Reference: Congruent with IntvwDrAttention.DiscussionNature, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: Subject 

Attribute Codes 
Code Meaning 
0 Not conversing 
1 Business 
2 Social 
3 Family matter 
4 Argument 
5 Disciplinary 
7 No driver present 
8 Other (specify) 
9 Unknown 

Nature Of Relationship Between Driver And Person Conversing With 

Definition: This variable documents the relationship between the driver and the person the 
driver was conversing with during the immediate pre-crash phase. 

Cross Reference: Congruent with IntvwDrAttention.OnPhone, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: Conversant 

Attribute Codes 

Code Meaning 

0 Not conversing 
No relation/stranger 
Business 
Social (friend) 
Boyfriend/girlfriend 
Husband/wife 
Driver/co-driver 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

7 Parent/child 
77 No driver present 
88 Other (specify) 
99 Unknown 

Location Of Exterior Factor 

Definition: This variable documents the location of the exterior factor with respect to the driver’s 
location at the time the distraction first occurred. 

Variable Name: OutsideLocation 

Attribute Codes 
Code Meaning 
0 No exterior factors 
1 Forward 
2 Forward, left 
3 Forward, right 
4 Left 
5 Right 
6 Rearward 
7 No driver present 
8 Other (specify) 
9 Unknown 

Inadequate Surveillance 

Definition: This variable establishes inadequate surveillance behavior on the part of the driver of 
this vehicle. 

Cross Reference: Related to IntvwDrAttention.LookedDidNotSee, values will differ in part due to 
Interview vs. Researcher determined values. In conjunction with DriverAssessment.SightLine, 
DriverAssessment.Obscured, and DriverAssessment.Focused matches 
Overview.OVESurveillance. 

Variable Name: ADDSurveillance 

Attribute Codes 

Code Meaning 

0 No additional surveillance factors 
1 Failed to look far enough ahead 
2 Failed to look to either side ahead 
3 Failed to look to side 
4 Failed to look to rear (mirrors) 
5 Failed to look other (specify) 
6 Looked, but did not see 
9 Unknown 
77 No driver present 
88 Other (specify) 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

Tracking Of Rear Exterior Factor 

Definition: This variable establishes how the driver tracked the exterior factor when this factor is 
located behind the vehicle. 

Variable Name: Tracking 

Attribute Codes 

Code Meaning 

0 No exterior factors 
1 Turned head 
2 Used rearview mirror 
3 Used side mirror 
7 No driver present 
8 Other (specify) 
9 Unknown 


Other Recognition Factors 

Definition: This variable establishes the occurrence of other recognition factors related to this 
driver. 

Cross Reference: In conjunction with DriverRecognitionDistraction.Inattention, 
DriverRecognitionDistraction.Conversation, DriverRecognitionDistraction.InteriorDistractionCount, 
and ExteriorDistractionCount matches Overview.OVERecognition. 

Variable Name: ADDRecognition 

Attribute Codes 

Code Meaning 

0 No other recognition factors 
1 Impending problem masked by traffic flow pattern 
2 Driver focused on extraneous vehicle 
3 Other recognition error (specify) 
7 No driver present 
9 Unknown 


Interior Distraction Count 

Definition: This variable documents the number of interior distractions that were coded for this 
driver. 

Cross Reference: Computed from the following variables in the DriverRecognitionDistraction 
data set: OccupantMovement, ADDDialingPhone, ADDAdjustingRadio, OtherControls, 
FloorRetrieval, OtherRetrieval, OtherInternal. In conjunction with 
DriverRecognitionDistraction.Inattention, DriverRecognitionDistraction.Conversation, 
DriverRecognitionDistraction.ADDRecognition, and ExteriorDistractionCount matches 
Overview.OVERecognition. 

Variable Name: InteriorDistractionCount 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

Attribute Codes 
Code Meaning 
0-6 Count of interior distractions present 
7 No driver present 
9 Unknown 

Looking At Movement/Actions Of Other Occupants 

Definition: This variable documents whether or not the driver is distracted by other occupants in 
the vehicle. (This variable was originally an attribute choice under the variable “Other Non-Driving 
Activities,” which had to do with distractions internal to the vehicle.) 

Cross Reference: Congruent with IntvwDrAttention.OtherOccupant, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: OccupantMovement 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Dialing/Hanging Up Phone 

Definition: This variable documents whether or not the driver is distracted as a result of either 
dialing or hanging up a phone during the pre-crash phase. (This variable was originally an 
attribute choice under the variable “Other Non-Driving Activities,” which had to do with 
distractions internal to the vehicle.) 

Cross Reference: Congruent with IntvwDrAttention.IDADialingPhone, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ADDDialingPhone 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Adjusting Radio/CD Player 

Definition: This variable documents whether or not the driver is distracted as a result of 
attempting to adjust the sound system controls during the pre-crash phase. (This variable was 
originally an attribute choice under the variable “Other Non-Driving Activities,” which had to do 
with distractions internal to the vehicle.) 

Cross Reference: Congruent with IntvwDrAttention.IDAAdjustingRadio, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: ADDAdjustingRadio 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Adjusting Other Vehicle Controls 

Definition: This variable documents whether or not the driver is distracted as a result of 
attempting to adjust the heat, vent or air conditioning controls during the pre-crash phase. This 
category also includes attempted adjustments to other OEM and after-market controls. (This 
variable was originally an attribute choice under the variable “Other Non-Driving Activities,” which 
had to do with distractions internal to the vehicle.) 

Cross Reference: Congruent with IntvwDrAttention.AdjustingClimate and/or 
IntvwDrAttention.OtherDevice, values will differ due to Interview vs. Researcher determined 
values. 

Variable Name: OtherControls 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Retrieving Object From Floor And/Or Seat 

Definition: This variable documents whether or not the driver is distracted as a result of trying to 
retrieve an object from either the floor or seat while driving. The objects in this category include 
everything with the exception of items related to smoking or eating, which are addressed in the 
“Other” category. (This variable was originally an attribute choice under the variable “Other Non-
Driving Activities,” which had to do with distractions internal to the vehicle.) 

Cross Reference: Congruent with IntvwDrAttention.RetrievingFallen, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: FloorRetrieval 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Retrieving Object From Other Location 

Definition: This variable documents whether or not the driver is distracted as a result of trying to 
retrieve an object from a location other than the floor or seat while driving. Again, the objects in 
this category include everything with the exception of items related to smoking or eating, which 
are addressed in the “Other” category. (This variable was originally an attribute choice under the 
variable “Other Non-Driving Activities,” which had to do with distractions internal to the vehicle.) 

Variable Name: OtherRetrieval 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 
Attribute Codes 

Code Meaning 
0 Absent 
1 Present 

Other Internal Distraction 

Definition: This variable documents whether or not the driver is distracted by internal factors not 
described in the other variables. Examples include smoking, eating, drinking, and reading-related 
activities. (This variable was originally an attribute choice under the variable “Other Non-Driving 
Activities,” and was the “Other (specify)” attribute choice.) 

Cross Reference: Related to a combination of the following variables from the IntvwDrAttention 
data set: Reading, Eating, Smoking, etc. Values will differ in part due to Interview vs. Researcher 
determined values. 

Variable Name: OtherInternal 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Exterior Distraction Count 

Definition: This variable documents the number of exterior distractions that were coded for this 
driver. 

Cross Reference: Computed from the following variables in the DriverRecognitionDistraction 
data set: ADDPreviousCrash, ApproachingTraffic, StreetAddress, ExternalPerson, Building, 
UnspecifiedExternal, OtherExternal. Congruent with IntvwDrAttention.OusideObject, values will 
differ due to Interview vs. Researcher determined values. In conjunction with 
DriverRecognitionDistraction.Inattention, DriverRecognitionDistraction.Conversation, 
DriverRecognitionDistraction.ADDRecognition, and InteriorDistractionCount matches 
Overview.OVERecognition. 

Variable Name: ExteriorDistractionCount 

Attribute Codes 
Code Meaning 
0-6 Count of exterior distractions present 
7 No driver present 
9 Unknown 

Looking At Previous Crash 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to look at a previous crash (i.e. rubbernecking). (This variable was originally an 
attribute choice under the variable “Exterior Factors” and had to do with the driver focusing on 
factors that were exterior to the vehicle.) 

Variable Name: ADDPreviousCrash 

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Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Looking At ApproachingTraffic 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to look at approaching traffic either in an adjoining lane or across a median area. 
(This variable was originally an attribute choice under the variable “Exterior Factors” and had to 
do with the driver focusing on factors that were exterior to the vehicle.) 

Variable Name: ApproachingTraffic 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Looking For Street Address 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to search for a street address (usually searching for a specific building number). (This 
variable was originally an attribute choice under the variable “Exterior Factors” and had to do with 
the driver focusing on factors that were exterior to the vehicle.) 

Variable Name: StreetAddress 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Looking At Outside Person 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to look at a person who is exterior to this vehicle. The person can be a pedestrian, 
bicyclist, skater, and an occupant of another vehicle or even a person in a building. (This variable 
was originally an attribute choice under the variable “Exterior Factors” and had to do with the 
driver focusing on factors that were exterior to the vehicle.) 

Variable Name: ExternalPerson 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual DriverRecognitionDistraction Data Set • 147 


Variable Definitions and Codes - DriverRecognitionDistraction Data Set 

Looking At Building 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to look at a building (usually as a result of seeing a feature of interest). (This variable 
was originally an attribute choice under the variable “Exterior Factors” and had to do with the 
driver focusing on factors that were exterior to the vehicle.) 

Variable Name: Building 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Unspecified Outside Focus 

Definition: This variable documents whether or not the driver removes his/her focus from the 
driving task to focus on something exterior to the vehicle, but there is insufficient information to 
determine the direction or the specific object that is being examined. (This variable was originally 
an attribute choice under the variable “Exterior Factors” and had to do with the driver focusing on 
factors that were exterior to the vehicle.) 

Variable Name: UnspecifiedExternal 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other External Distraction 

Definition: This variable documents whether or not the driver was distracted by something that 
is exterior to the vehicle and that is not adequately described by the other variables. (This 
variable was originally an attribute choice under the variable “Exterior Factors” and was the 
“Other (specify)” attribute choice.) 

Variable Name: OtherExternal 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

LTCCS Analytical User's Manual DriverRecognitionDistraction Data Set • 148 


Variable Definitions and Codes - DriverSleep Data Set 

DriverSleep Data Set 

The DriverSleep data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverSleep data set with other vehicle level data sets. This data 
set also contains the following variables: 

Hours Of Last Sleep 

Definition: This represents the number of hours the driver slept (most recent sleep interval). 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.LastLenght, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: LastSleepHours 

Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Start Time Of Last Sleep Interval 

Definition: The time of day (military time) that the driver began his/her last sleep interval. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.LastStart, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: LastSleepStart 

Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
LTCCS Analytical User's Manual DriverSleep Data Set • 149 


Variable Definitions and Codes - DriverSleep Data Set 

End Of Last Sleep Interval 

Definition: This is the time of day (military time) that the driver awoke from his/her last sleep 
interval. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.LastEnd, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: LastSleepEnd 

Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Hours Since Last Sleep 

Definition: This represents the number of hours that have passed since the driver has awoken 
from his/her last sleep interval. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.LastSince, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: HoursSinceSleep 

Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
If Hours Of Sleep Were Less Than 4 Hours, Hours Of Last Main Sleep 

Definition: If the driver’s last sleep interval was less than 4 hours, this is the number of hours 
that the driver slept in his/her previous sleep interval where that interval was greater than 4 hours 

(i.e. “main” sleep interval). 
Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

LTCCS Analytical User's Manual DriverSleep Data Set • 150 


Variable Definitions and Codes - DriverSleep Data Set 

Cross Reference: Congruent with IntvwDrSleep.Less4Lenght, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: MainSleepHours 
Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Start Of Main Sleep Interval 

Definition: This is the time of day (military time) that the driver’s main sleep interval began. This 
variable should be coded when the driver’s last sleep interval was less than 4 hours. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.Less4Start, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: MainSleepStart 
Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
End Of Main Sleep Interval 

Definition: This is the time of day (military time) that the driver’s main sleep interval ended. This 
variable should be coded when the driver’s last sleep interval was less than 4 hours. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.Less4End, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: MainSleepEnd 
Attribute Codes 

Code Meaning 

00:00 No sleep 
00:01-24:00 Time (in HH:MM format) 
LTCCS Analytical User's Manual DriverSleep Data Set • 151 


Variable Definitions and Codes - DriverSleep Data Set 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 

Hours Driving Since Last 8-Hour Break 

Definition: This represents the number of hours the driver has been driving since he/she last 
had a break of at least 8 hours. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.Since8Driving, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: HoursDriving 

Attribute Codes 

Code Meaning 

00:00 No hours driving 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Hours On Duty Since Last 8-Hour Break 

Definition: This represents the number of hours the driver has been on duty since he/she last 
had a break of at least 8 hours. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.Since8OnDuty, values will differ due to 
Interview vs. Researcher determined values. 

Variable Name: HoursOnDuty 

Attribute Codes 

Code Meaning 

00:00 No hours on duty 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Longest Work Day In Preceding 7-Day Interval 

Definition: This number represents the number of hours the driver worked on his/her longest 
workday in the 7-day interval preceding the crash. 

LTCCS Analytical User's Manual DriverSleep Data Set • 152 


Variable Definitions and Codes - DriverSleep Data Set 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: Congruent with IntvwDrSleep.Longest, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: WeekLongest 

Attribute Codes 

Code Meaning 

00:00 No work hours 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
99:99 Unknown 
Shortest Work Day In Preceding 7-Day Interval 

Definition: This number represents the number of hours the driver worked on his/her shortest 
workday in the 7-day interval preceding the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: Congruent with IntvwDrSleep.Shortest, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: WeekShortest 

Attribute Codes 

Code Meaning 

00:00 No work hours 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
99:99 Unknown 
Average Work Day In Preceding 7-Day Interval 

Definition: This number represents the average number of hours the driver worked per day in 
the 7-day interval preceding the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: Congruent with IntvwDrSleep.Average, values will differ due to Interview vs. 
Researcher determined values. 

Variable Name: WeekAverage 

LTCCS Analytical User's Manual DriverSleep Data Set • 153 


Variable Definitions and Codes - DriverSleep Data Set 

Attribute Codes 

Code Meaning 

00:00 No work hours 
00:01-24:00 Time (in HH:MM format) 
97:97 No driver present 
99:99 Unknown 
Did The Time At Which The Driver Began To Sleep Rotate/Shift In Last 7 Days? 

Definition: This variable establishes the occurrence of a rotating sleep period (i.e. beginning of 
sleep interval changes during the period). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source here is the driver interview; secondary sources include surrogate interviews, other 
occupant interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.ShiftRotate, values will differ due to Interview 
vs. Researcher determined values. 

Variable Name: Rotation 

Attribute Codes 

Code Meaning 

1 Yes (specify) 
2 No 
7 No driver present 
9 Unknown 


Hours Worked On Day Of Crash 

Definition: This represents the number of hours the driver worked on the day of the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: Congruent with IntvwDrSleep.Last24Worked, values will differ due to 
Interview vs. Researcher determined values. Congruent with IntvwCarrier.CAIHoursOnDuty, 
values will differ due to Interview vs. Researcher determined values. 

Variable Name: HoursWorked 

Attribute Codes 

Code Meaning 

00:00-24:00 Time (in HH:MM format) 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
LTCCS Analytical User's Manual DriverSleep Data Set • 154 


Variable Definitions and Codes - DriverSleep Data Set 

Longest Length Of Daily Sleep In Preceding 7-Day Interval 

Definition: This is the number of hours the driver slept in the 7-day interval preceding the crash 
that represents his/her longest interval of daily sleep. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.IDSLongestDay, values will differ due to 
Interview vs. Researcher determined values. Congruent with IntvwCarrier.LongestDay, values will 
differ due to Interview vs. Researcher determined values. 

Variable Name: ADSLongestDay 

Attribute Codes 

Code Meaning 

00:00-24:00 Time (in HH:MM format) 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Shortest Length Of Daily Sleep In Preceding 7-Day Interval 

Definition: This is the number of hours the driver slept in the 7-day interval preceding the crash 
that represents his/her shortest interval of daily sleep. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

Cross Reference: Congruent with IntvwDrSleep.IDSShortestDay, values will differ due to 
Interview vs. Researcher determined values. Congruent with IntvwCarrier.ShortestDay, values 
will differ due to Interview vs. Researcher determined values. 

Variable Name: ADSShortestDay 

Attribute Codes 

Code Meaning 

00:00-24:00 Time (in HH:MM format) 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Average Length Of Daily Sleep In Preceding 7-Day Interval 

Definition: This represents the average number of hours the driver slept per day in the 7-day 
interval preceding the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include surrogate interviews, other occupant 
interviews, log book entries, time stamped fuel and toll receipts, and carrier records. 

LTCCS Analytical User's Manual DriverSleep Data Set • 155 


Variable Definitions and Codes - DriverSleep Data Set 

Cross Reference: Congruent with IntvwDrSleep.AverageWorkDay, values will differ due to 
Interview vs. Researcher determined values. Congruent with IntvwCarrier.CAIAverageDay, 
values will differ due to Interview vs. Researcher determined values. 

Variable Name: AverageDay 

Attribute Codes 

Code Meaning 

00:00-24:00 Time (in HH:MM format) 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
Total Hours Worked On Primary Job During Preceding 7-Day Interval 

Definition: This represents the total number of hours that the driver worked on his primary job 
during the 7-day interval preceding the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: In conjunction with DriverSleep.LastWeekMoonlight congruent with 
IntvwDrSleep.TotalHours, values will differ due to Interview vs. Researcher determined values. In 
conjunction with DriverSleep.LastWeekMoonlight congruent with IntvwCarrier.CAITotalHours, 
values will differ due to Interview vs. Researcher determined values. 

Variable Name: LastWeekHours 

Attribute Codes 

Code Meaning 

00:00:130:00 Time (in HH:MM format) 
97:97 No driver 
98:98 Not applicable 
99:99 Unknown 
Hours Worked On Second Job During Preceding 7-Day Interval 

Definition: This number represents the number of hours the driver worked on his/her second job 
during the 7-day interval preceding the crash. 

Source: Determined by the Case Reviewer using all available information inputs. Primary data 
source is the driver interview; secondary sources include carrier records, log book entries and 
surrogate interviews with the driver's family members/friends. 

Cross Reference: Congruent with IntvwCarrier.HoursWorked7Days, values will differ due to 
Interview vs. Researcher determined values. In conjunction with DriverSleep.LastWeekHours 
congruent with IntvwDrSleep.TotalHours, values will differ due to Interview vs. Researcher 
determined values. In conjunction with DriverSleep.LastWeekHours congruent with 
IntvwCarrier.CAITotalHours, values will differ due to Interview vs. Researcher determined values. 

Variable Name: LastWeekMoonlight 

LTCCS Analytical User's Manual DriverSleep Data Set • 156 


Variable Definitions and Codes - DriverSleep Data Set 

Attribute Codes 
Code Meaning 

00:00-130:00 Time (in HH:MM format) 

97:97 No driver present 
98:98 Not applicable 
99:99 Unknown 
LTCCS Analytical User's Manual DriverSleep Data Set • 157 


Variable Definitions and Codes - Environment Data Set 

Environment Data Set 

The Environment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the Environment data set with other vehicle level data sets. This data 
set also contains the following variables: 

Relation To Roadway 

Definition: This variable describes the characteristics of this vehicle’s roadway environment just 
prior to the critical precrash event. 

Source: Researcher determined – primary source is the scene inspection, secondary sources 
include the police report and interviews. 

Variable Name: RoadRelation 

Attribute Codes 
Code Meaning 
1 On roadway 
2 Shoulder 
3 Median 
4 Roadside 
5 Outside right-of-way 
6 Off roadway - location unknown 
7 In parking lane 
8 Gore 
9 Unknown 

Relation To Junction 

Definition: This variable describes this vehicle’s roadway as it relates to a junction. A junction is, 
in general, the area formed by the connection of two roadways. It includes (1) all at-grade 
intersections, (2) connections between a driveway access or alley access and a roadway that is 
not a driveway access or an alley access, (3) connections between two alley accesses or 
driveway accesses, or (4) a connection between a driveway and an alley access. An interchange 
is an area around a grade separation that involves at least two trafficways. Included within its 
boundaries are: (1) all ramps that connect the roadways, and (2) each roadway entering or 
leaving the interchange to a point 30 meters (100 feet) beyond the gore or curb return at the 
outermost ramp connection for the roadway. Included within an interchange area are 
intersections, driveway accesses, and roadway sections that are non-junction. 

Source: Researcher determined – primary source is the scene inspection, secondary sources 
include the police report and interviews. 

Variable Name: Junction 

Attribute Codes 
Code1 
2 
Meaning 
Non-junction 
Intersection 
3 Intersection related 

LTCCS Analytical User's Manual Environment Data Set • 158 


Variable Definitions and Codes - Environment Data Set 

4 Driveway, alley access, etc. 
5 Entrance/exit ramp related 
6 Rail grade crossing 
7 In crossover 
9 Unknown, non interchange 
15 Other location in interchange 
19 Unknown, interchange area 
99 Unknown 
Interchange 

Definition: This variable determines whether or not the crash involved an interchange. An 
interchange is an area around a grade separation that involves at least two trafficways. Included 
within its boundaries are: (1) all ramps that connect the roadways, and (2) each roadway 
entering or leaving the interchange to a point 30 meters (100 feet) beyond the gore or curb return 
at the outermost ramp connection for the roadway. Included within an interchange area are 
intersections, driveway accesses, and roadway sections that are non-junction. 

Source: Researcher determined – primary source is the scene inspection, secondary sources 
include the police report and interviews. 

Variable Name: Interchange 

Attribute Codes 

Code Meaning 

0 No 
1 Yes 
9 Unknown 
15 Unknown Interchange Area - this when it was selected as an interchange 
-9999 Unknown - this is when it was not selected as an interchange 

Trafficway Flow 

Definition: This variable describes the flow of traffic as specified by the design of the roadway 
just prior to the critical precrash event. 

Source: Researcher determined – primary source is the scene inspection, secondary sources 
include the police report and interviews. 

Variable Name: ENVTrafficFlow 

Attribute Codes 

Code Meaning 

1 Divided trafficway-median strip without positive barrier 
2 Divided trafficway-median strip with positive barrier 
3 One way traffic 
4 Not physically divided (two way traffic) 
5 Not physically divided with two-way left turn lane 
9 Unknown 

LTCCS Analytical User's Manual Environment Data Set • 159 


Variable Definitions and Codes - Environment Data Set 

Trafficway Flow Restrictions 

Definition: This variable identifies preexisting trafficway flow restrictions that hindered the 
general flow of traffic in some way. Selection of specific attributes does not imply that the 
restriction contributed to crash causation. 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Cross Reference: Related to the following variables from FactorAssessment: NoTraffic, 
ConstructionZone, RushHour, Underwater, AFTPreviousCrash. 

Variable Name: FlowRestriction 

Attribute Codes 
Code0 
1 
2 
3 
4 
5 
8 
9 
Meaning 
No restrictions 
Work zone 
Roadway immersed 
Prior crash 
Congestion 
Dust storm 
Other (specify) 
Unknown 
Intersection Type 

Definition: This variable defines the intersection type for those crashes that occur in an 
intersection or are intersection-related. For example, if there is a stream of traffic stopped on the 
approach to an intersection and a vehicle at the rear of this traffic stream is struck in the rear by a 
second vehicle, the crash is considered intersection-related and intersection type is coded for this 
crash. 

Source: Research determined – primary source is the scene inspection, secondary sources 
include the police report and local maps/site plans. 

Variable Name: IntersectionType 

Attribute Codes 

Code Meaning 

0 Non-intersection (and not intersection related) 
1 Signalized cross intersection 
2 Cross intersection with right turn lane(s) and stop control on minor street 
3 Cross intersection with left turn lane(s) and stop control on minor street 
4 Cross intersection with left/right turn lane(s) and stop control on minor street 
5 Cross intersection with no turning lanes and stop control on minor street 
6 Signalized Tee intersection 
7 Tee intersection with turn lanes and stop control on minor street 
8 Tee intersection with no turn lanes and stop control on minor street 
88 Other (specify) 
99 Unknown 

LTCCS Analytical User's Manual Environment Data Set • 160 


Variable Definitions and Codes - Environment Data Set 

Number Of Travel Lanes 

Definition: This variable establishes the number of travel lanes that existed for this vehicle prior 
to the critical precrash event. The attribute related to this variable is determined from the same 
roadway that was used to determine the variable “Trafficway Flow.” If traffic flows in both 
directions and is undivided, the number of lanes in both directions is indicated. If the trafficway is 
divided into two or more roadways, only the number of lanes for the roadway on which this 
vehicle was traveling is indicated. If turn bays, acceleration, deceleration, or center two-way left 
turn lanes exist and are physically located within the cross section of the roadway and these 
lanes are the most representative of the driver’s environment just prior to the critical precrash 
event, then they are included in the number of lanes. 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Variable Name: TravelLanes 

Attribute Codes 
Code1 
2 
3 
4 
5 
6 
7 
9 
Meaning 
One 
Two 
Three 
Four 
Five 
Six 
Seven or more 
Unknown 
Access Control 

Definition: This variable describes the level of control maintained for vehicles attempting to 
enter/exit the roadway. The attribute is determined for the same roadway as described in the 
variable “Number Of Travel Lanes.” 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Variable Name: AccessControl 

Attribute Codes 
Code1 
2 
3 
9 
Meaning 
Full control 
No control 
Other (specify) 
Unknown 
Route Signing 

Definition: This variable describes the general class of roadway by noting the type of route 
signing. The attribute is determined for the same roadway described in the variable “Number Of 
Travel Lanes.” 

Source: Researcher determined – primary source is the scene inspection; secondary sources 

LTCCS Analytical User's Manual Environment Data Set • 161 


Variable Definitions and Codes - Environment Data Set 

include the police report and state maps. 

Variable Name: Signage 

Attribute Codes 
Code Meaning 
1 Interstate 
2 U.S. highway 
3 State highway 
4 County road 
5 Township 
6 Municipality 
7 Frontage road 
8 Other (specify) 
9 Unknown 

Trafficway Functional Class 

Definition: This variable is based upon the Federal Highway Administration’s classification 
system for identifying a roadway functional system. The basic functional systems are: (1) rural 
areas, (2) urbanized areas, and (3) small urban areas (under 50,000 in population). Each system 
is comprised of various functional categories. 

Source: Researcher determined – primary data source include state maps and the scene 
inspection (not the police report). 

Variable Name: FunctionalClass 

Attribute Codes 

Code Meaning 

1 Rural principal arterial - Interstate 
2 Rural principal arterial - other 
3 Rural minor arterial 
4 Rural major collector 
5 Rural minor collector 
6 Rural local 
7 Rural unknown 
8 Urban principal arterial - Interstate 
9 Urban principal arterial - Freeways and Expressways 
10 Urban principal arterial - other 
11 Urban minor arterial 
12 Urban collector 
13 Urban local 
14 Urban unknown 
99 Unknown 

Light Conditions 

Definition: This variable establishes the light conditions of the roadway at the time of the crash 
and represents both ambient and artificial sources of light. 

LTCCS Analytical User's Manual Environment Data Set • 162 


Variable Definitions and Codes - Environment Data Set 

Source: Researcher determined – primary source is the police report; secondary sources 
include interviews and scene inspection. 

Variable Name: Daylight 

Attribute Codes 
Code1 
2 
Meaning 
Daylight 
Dark 
3 
4 
Dark, but lighted 
Dawn 
5 Dusk 
9 Unknown 

Traffic Control Device 

Definition: This variable documents the above-ground traffic control(s) that regulate vehicular 
traffic in the vehicle’s environment just prior to this vehicle’s critical precrash event. The attribute 
is determined for the same roadway that is used to define the variable “Trafficway Flow.” 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Variable Name: TrafficControl 

Attribute Codes 
Code Meaning 
0 No Control Devices 
1 Control signal (on colors) w/pedestrian signal 
2 Control signal (on colors) w/o pedestrian signal 
3 Control signal (on colors) unknown pedestrian signal 
4 Flashing control signal 
5 Flashing beacon 
6 Flashing highway signal, unknown or other 
7 Lane use control signal 
8 Other highway signal 
9 Unknown highway signal 
20 Stop sign 
21 Yield sign 
22 Other regulatory sign 
29 Unknown type of regulatory sign 
30 School speed limit sign 
31 School advance or crossing sign 
38 Other school related sign 
40 Warning sign 
50 Office, crossing guard, flagman, etc 
60 Gates (active) 
61 Flashing lights (active) 
62 Traffic control signal (active) 
63 Wigwags (active) 
64 Bells (active) 

LTCCS Analytical User's Manual Environment Data Set • 163 


Variable Definitions and Codes - Environment Data Set 

68 Other train activated device 
69 Active device, type unknown 
70 Cross-bucks (passive) 
71 Stop Sign (passive) 
72 Other railroad crossing sign (passive) 
73 Special warning device (passive) 
78 Other passive device 
79 Passive device, type unknown 
80 Grade crossing controlled, type unknown 
98 Other (specify) 
99 Unknown 

Railroad Grade Crossing? 

Definition: This variable establishes whether or not a railroad-crossing device was present at 
the time of the crash. 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Variable Name: Railroad 

Attribute Codes 

Code Meaning 

0 No 
1 Yes 
2 Unknown 
70 Active Device, Type Unknown 
-9999 Unknown for non railroad devices 

Traffic Control Device Functioning 

Definition: This variable establishes whether or not the traffic control device that was identified 
in the variable “Traffic Control Device” was functioning properly (as it was designed to function). 

Source: Researcher determined – inputs include scene inspection, interviews, and police report. 

Variable Name: Functioning 

Attribute Codes 

Code Meaning 

0 No traffic control device 
1 Traffic control device not functioning (specify) 
2 Traffic control device functioning properly 
9 Unknown 

Roadway Class 

Definition: This variable designates the class of roadway within rural and urban categories. The 
“urban” designation includes urbanized and small urban areas (under 50,000 in population). In 

LTCCS Analytical User's Manual Environment Data Set • 164 


Variable Definitions and Codes - Environment Data Set 

general, the “freeways” designation includes freeways, expressways, thruways, and other 
controlled-access roadway segments. 

Source: Researcher determined – primary data sources include state maps and the scene 
inspection (not the police report.) 

Variable Name: RoadwayClass 

Attribute Codes 

Code Meaning 

1 Rural Freeway (> 4 lanes) 
2 Rural Freeway (<= 4 lanes) 
3 Rural multi-lane divided, non-Freeway 
4 Rural multi-lane undivided, non-Freeway 
5 Rural two-lane road 
6 Rural unknown 
7 Urban Freeway (> 4 lanes) 
8 Urban Freeway (<= 4 lanes) 
9 Urban multi-lane divided, non-Freeway 
10 Urban multi-lane undivided, non-Freeway 
11 Urban two-lane road 
12 Urban unknown 
99 Unknown 


Roadway Alignment 

Definition: This variable describes the alignment of the roadway just prior to the vehicle’s critical 
precrash event. This element is determined from the same roadway that was used to determine 
the variable “Trafficway Flow.” 

Source: Researcher determined – primary source is scene inspection; secondary sources 
include the police report and interviews. 

Cross Reference: Related to FactorAssessment.RoadGeometry. 

Variable Name: RoadAlignment 

Attribute Codes 

Code Meaning 

1 Straight 
2 Curve right 
3 Curve left 
9 Unknown 


Roadway Profile 

Definition: This variable establishes the grade of the roadway just prior to the vehicle’s critical 
precrash event. To determine the grade, the vertical measurement is divided by the horizontal 
value; the result is a percentage value of the grade. This element is determined from the same 
roadway that was used to determine the variable “Trafficway Flow.” 

LTCCS Analytical User's Manual Environment Data Set • 165 


Variable Definitions and Codes - Environment Data Set 

Source: Researcher determined – primary source is scene inspection; secondary sources 
include police report and interviews. 

Variable Name: RoadProfile 

Attribute Codes 
Code1 
Meaning 
Level 
2 
3 
Uphill grade (>2%) 
Hill crest 
4 
5 
9 
Downhill grade (>2%) 
Sag 
Unknown 

Roadway Surface Type 

Definition: This variable describes the surface type of the roadway just prior to the vehicle’s 
critical precrash event. This element is determined from the same roadway that was used to 
determine the variable “Trafficway Flow.” 

Source: Researcher determined – primary source is scene inspection; secondary sources 
include police report and interviews. 

Variable Name: RoadSurface 

Attribute Codes 

Code Meaning 

1 Concrete 
2 Bituminous (asphalt) 
3 Brick or block 
4 Slag, gravel, or stone 
5 Dirt 
8 Other (specify) 
9 Unknown 

Roadway Surface Condition 

Definition: This variable describes the condition of the surface of the roadway just prior to the 
vehicle’s critical precrash event. This element is determined from the same roadway that was 
used to determine the variable “Trafficway Flow.” 

Source: Researcher determined – primary source is the police report; secondary sources 
include interviews, and scene inspection. 

Cross Reference: Related to FactorAssessment.SlickSurface and 
FactorAssessment.Underwater. 

Variable Name: SurfaceCondition 

LTCCS Analytical User's Manual Environment Data Set • 166 


Variable Definitions and Codes - Environment Data Set 

Attribute Codes 
Code Meaning 
1 Dry 
2 Wet 
3 Snow or slush 
4 Ice 
5 Sand, dirt, or oil 
8 Other (specify) 
9 Unknown 

Roadway Surface Defect 

Definition: This variable describes the presence of any surface defects of the roadway just prior 
to the vehicle’s critical precrash event, regardless of the relative contribution of the defect(s) to 
crash causation. This element is determined from the same roadway that was used to determine 
the variable “Number Of Travel Lanes.” 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Cross Reference: Related to FactorAssessment.PoorCondition. 

Variable Name: SurfaceDefect 

Attribute Codes 

Code Meaning 

0 No defects noted 
1 Defect noted (specify) 
9 Unknown 

Roadway Design Deficiencies 

Definition: This variable identifies design deficiencies of the roadway as they relate to 
established AASHTO standards. 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include the police report and interviews. 

Variable Name: DesignDefect 

Attribute Codes 

Code Meaning 

0 No deficiencies notes 
Inappropriate signage speeds 
Insufficient crown 
Excessive crown 
Insufficient super-elevation 
Excessive super-elevation 
Excessive curvature 
No shoulder/ Breakdown lane 

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Variable Definitions and Codes - Environment Data Set 

8 Other (specify) 
9 Unknown 

Shoulder Surface Type 

Definition: This variable establishes stabilized shoulder presence at the crash site and the type 
of available shoulder surface. A shoulder is defined as that part of a trafficway that is (1) 
contiguous with the roadway for emergency use, (2) for accommodation of stopped road vehicles, 
and (3) for lateral support of the roadway structure. 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include on-scene photographs. 

Variable Name: ShoulderType 

Attribute Codes 
Code0 
1 
2 
3 
4 
5 
8 
9 
Meaning 
No stabilized shoulder 
Concrete 
Bituminous (asphalt) 
Brick or block 
Slag, gravel, or stone 
Dirt 
Other (specify) 
Unknown 
Shoulder Width 

Definition: This variable establishes the width of the stabilized shoulder available to this vehicle. 
To qualify as a stabilized shoulder, the measured shoulder width must exceed two feet (0.61 
meters). 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include on-scene photographs. 

Variable Name: ShoulderWidth 

Attribute Codes 

Code Meaning 

0 No stabilized shoulder 
1 < 1 meter 
2 > 1 <= 2 meters 
3 > 2 <= 3 meters 
4 > 3 meters 
9 Unknown 


Rumble Strip Type/Involvement 

Definition: This variable establishes the presence of a rumble strip, the type of rumble strip, and 
whether or not the rumble strip was involved in the pre-crash circumstances in terms of this 
vehicle either departing or not departing the roadway. 

LTCCS Analytical User's Manual Environment Data Set • 168 


Variable Definitions and Codes - Environment Data Set 

Source: Researcher determined – primary source is the scene inspection; secondary sources 
include on-scene photographs. 

Variable Name: RumbleStrip 

Attribute Codes 
Code Meaning 
0 No rumble strip present 
1 Raised rumble strip/no pre-crash departure 
2 Raised rumble strip/partial pre-crash departure 
3 Raised rumble strip/full pre-crash departure 
4 Depressed rumble strip/no pre-crash departure 
5 Depressed rumble strip/partial pre-crash departure 
6 Depressed rumble strip/full pre-crash departure 
8 Other (specify) 
9 Unknown 

Sight Line Restrictions? 

Definition: This variable establishes sight line restrictions for the driver of this vehicle after 
measuring the sight distance and comparing it to AASHTO standards. This determination is 
based on recommended sight distances as established by AASHTO. For safety on a highway, the 
roadway designer must provide sight distance of sufficient length that drivers can control the 
operation of their vehicle to avoid striking an unexpected object on the travel way. 

Source: Researcher determined – primary source is the scene inspection. 

Cross Reference: Related to the difference between FactorAssessment.SightDistance and 
FactorAssessment.AASHToRecommended. 

Variable Name: SightLineRestriction 

Attribute Codes 

Code Meaning 

1 No 
2 Yes (specify) 
9 Unknown 

Sight Line Distance 

Definition: This variable is the measured sight line distance and represents the distance along 
the roadway that an object of specified height is continuously visible to the driver. This distance is 
dependent on the height of the driver’s eye above the road surface, the specified object height 
above the road surface, and the height of sight obstructions within the line of sight. 

Source: Researcher determined – primary source is the scene inspection. 

Variable Name: SightLineDistance 

Attribute Codes 

Code Meaning 

* Distance value (m) 
8887 No sight line restriction, this vehicle 
LTCCS Analytical User's Manual Environment Data Set • 169 


Variable Definitions and Codes - Environment Data Set 

9997 Unknown if sight line restricted, this vehicle 
9999 Sight line restriction, this vehicle, actual distance not measured 

AASHTO Sight Distance 

Definition: This variable identifies the AASHTO-recommended sight distance for the roadway on 
which the crash occurred. This variable will have a value attached to it when a sight line 
restriction is suspected and the actual sight distance is measured. The sight distance as 
measured is then compared to the recommended sight distance for that situation. 

Source: Researcher determined utilizing the AASHTO (American Association of State Highway 
and Transportation Officials) document “A Policy on Geometric Design of Highways and Streets 
(4th edition).” 

Variable Name: AASHToDistance 

Attribute Codes 
Code Meaning 
* Distance value (m) 
8887 No sight line restriction, this vehicle 
9997 Unknown if sight line restricted, this vehicle 
9999 Sight line restriction, this vehicle, recommended distance unknown 

No Adverse Conditions 

Definition: This variable documents whether or not there were no adverse atmospheric-related 
driving conditions just prior to the critical event. (This variable was originally an attribute choice 
under the variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVNoConditions 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Rain 

Definition: This variable documents whether or not it was raining just prior to the critical event. 
(This variable was originally an attribute choice under the variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection 

Variable Name: ENVRain 

LTCCS Analytical User's Manual Environment Data Set • 170 


Variable Definitions and Codes - Environment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Snow 

Definition: This variable documents whether or not it was snowing just prior to the critical event. 
(This variable was originally an attribute choice under the variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVSnow 
Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Fog 

Definition: This variable documents whether or not fog was present just prior to the critical 
event. (This variable was originally an attribute choice under the variable “Atmospheric 
Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVFog 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Wind Gusts 

Definition: This variable documents whether or not heavy wind gusts were present just prior to 
the critical event. (This variable was originally an attribute choice under the variable “Atmospheric 
Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVWindGusts 

LTCCS Analytical User's Manual Environment Data Set • 171 


Variable Definitions and Codes - Environment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Hail 

Definition: This variable documents whether or not hail was falling just prior to the critical event. 

(This variable was originally an attribute choice under the variable “Atmospheric Conditions.”) 
Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Cross Reference: Identical to FactorAssessment.AFTHail. 
Variable Name: ENVHail 
Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Sleet 

Definition: This variable documents whether or not sleet (frozen or partially frozen raindrops) 
was falling just prior to the critical event. (This variable was originally an attribute choice under the 
variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVSleet 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Dust 

Definition: This variable documents whether or not heavy dust (with corresponding limited 
visibility) was present just prior to the critical event. (This variable was originally an attribute 
choice under the variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Cross Reference: Related to Environment.FlowRestriction (5 “Dust Storm”). 

Variable Name: ENVDust 

LTCCS Analytical User's Manual Environment Data Set • 172 


Variable Definitions and Codes - Environment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Atmospheric Conditions 

Definition: This variable documents whether or not there were other adverse atmospheric-
related driving conditions present just prior to the critical event that were not identified in the other 
atmospheric condition variables. (This variable was originally an attribute choice under the 
variable “Atmospheric Conditions.”) 

Source: Researcher determined – primary data sources include the police report and local 
weather information obtained by the NASS Researcher. Secondary data sources include 
interviews and scene inspection. 

Variable Name: ENVOtherConditions 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual Environment Data Set • 173 


Variable Definitions and Codes - Events Data Set 

Events Data Set 

The Events data set contains the variables CaseID, PSU, PSUStrat, RATWeight, VehicleNumber 
and EventSequence. EventSequence identifies a particular event in a sequence in the accident. 
CaseID and EventSequence uniquely identify each record in this data set. CaseID and 
EventSequence should be used to merge the Events data set with the CDCCrush data set. 
CaseID and VehicleNumber should be used to merge the Events data set with vehicle level data 
sets. This data set also contains the following variables: 

Stratum 

Definition: The Stratum is the letter identifying the CDS sampling classification to which the 
case is assigned. 

Source: Researcher determined. 

Variable Name: Stratum 

Attribute Codes 

Code Meaning 

* Text 
Class Of Vehicle (First Listing) 

Definition: This variable describes the class of vehicle for the first vehicle listed on the Case 
Form Events tab. This represents the same attribute as that found in the General Vehicle Data 
Set (“Class Of Vehicle” variable) and that found in the Vehicle Exterior Data Set (“Class Of 
Vehicle” variable). This classification is based on the size of the vehicle. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include police and other vehicle photographs. Partially determined by VIN information (size-based 
information). 

Cross Reference: Identical to GeneralVehicle.GVEVehicleClass when applicable. Identical to 
VehicleExterior.VEXVehicleClass when applicable. 

Variable Name: ClassVehicle 

Attribute Codes 

Code Meaning 

0 Not a motor vehicle 
1 Subcompact/mini (wheelbase < 254 cm) 
2 Compact (wheelbase >= 254 but < 265 cm) 
3 Intermediate (wheelbase >= 265 but < 278 cm) 
4 Full Size (wheelbase >= 278 but < 291 cm) 
5 Largest (wheelbase >= 291 cm) 
9 Unknown passenger car size 
14 Compact utility vehicle 
15 Large utility vehicle (<= 4,536 kg GVWR) 
16 Utility station wagon (<= 4,536 kg GVWR) 
19 Unknown utility type 
20 Minivan (<= 4,536 kg GVWR) 


LTCCS Analytical User's Manual Events Data Set • 174 


Variable Definitions and Codes - Events Data Set 

21 Large van (<= 4,536 kg GVWR) 
24 Van Based school bus (<= 4,536 kg GVWR) 
28 Other van type (<= 4,536 kg GVWR) 
29 Unknown van type (<= 4,536 kg GVWR) 
30 Compact pickup truck (<= 4,536 kg GVWR) 
31 Large pickup truck (<= 4,536 kg GVWR) 
38 Other pickup truck type (<= 4,536 kg GVWR) 
39 Unknown pick up truck (<=4,536 kg GVWR) 
45 Other light truck (<= 4,536 kg GVWR) 
48 Unknown light truck type (<= 4,536 kg GVWR) 
49 Unknown light vehicle type 
50 School bus (excludes van based)(>4,536 kg GVWR) 
58 Other bus (>4,536 kg GVWR) 
59 Unknown bus type 
60 Truck (>4,536 kg GVWR) 
67 Tractor without trailer 
68 Tractor-trailer(s) 
78 Unknown medium/heavy truck type 
79 Unknown light/medium/heavy truck type 
80 Motored cycle 
90 Other vehicle 
99 Unknown 


General Area Of Damage (First Vehicle Listed) 

Definition: This variable describes the general area of damage on the first vehicle. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

Cross Reference: Related to CDCCrush.DeformLocation and CDCCrush.DamageLocation. 

Variable Name: DamageArea 

Attribute Codes 

Code Meaning 

0 Not a motor vehicle 
9 Unknown 
B Back/Bk of unit with cargo area-rear of trailer or straight truck* 
C Rear of cab 
D Back (rear of tractor) 
F Front 
L Left Side 
N Noncollision 
R Right Side 
T Top 
U Undercarriage 
V Front of cargo area 

‘B’ represents ‘Back’ for a CDS vehicle, ‘Bk of unit with cargo area-rear of trailer or 
straight truck’ for a truck. 

LTCCS Analytical User's Manual Events Data Set • 175 


Variable Definitions and Codes - Events Data Set 

Object Contacted 

Definition: This variable describes the object or vehicle that was contacted by each vehicle in 
the case. 

Source: Researcher determined – primary sources are the scene and vehicle inspections; 
secondary sources include the police report and interviewees. 

Cross Reference: Related to VehicleEvents.FirstHarmfulEvent, if Events.EventSequence = 1 
when applicable. 

Variable Name: EVEObjectContact 

Attribute Codes 
Code Meaning 
1 Vehicle#1 
2 Vehicle#2 
3 Vehicle#3 
4 Vehicle#4 
5 Vehicle#5 
6 Vehicle#6 
7 Vehicle#7 
8 Vehicle#8 
9 Vehicle#9 
10 Vehicle#10 
11 Vehicle#11 
12 Vehicle#12 
13 Vehicle#13 
14 Vehicle#14 
15 Vehicle#15 
16 Vehicle#16 
17 Vehicle#17 
18 Vehicle#18 
19 Vehicle#19 
20 Vehicle#20 
21 Vehicle#21 
22 Vehicle#22 
23 Vehicle#23 
24 Vehicle#24 
25 Vehicle#25 
26 Vehicle#26 
27 Vehicle#27 
28 Vehicle#28 
29 Vehicle#29 
30 Vehicle#30 
31 Overturn->rollover(excludes end-over-end) 
32 Rollover->end-over-end 
33 Fire or explosion 
34 Jackknife 
35 Other intraunit damage (specify) 
36 Noncollision injury 

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Variable Definitions and Codes - Events Data Set 

38 Other noncollision (specify) 
39 Noncollision->details unknown 
41 Tree (<= 10 cm in diameter) 
42 Tree (> 10 cm in diameter) 
43 Shrubbery or bush 
44 Embankment 
45 Breakaway pole or post (any diameter) 
50 Nonbreakaway pole or post (<=10cm in diameter) 
51 Nonbreakaway pole or post (>10 cm but <= 30 cm in diameter) 
52 Nonbreakaway pole or post (>30 cm in diameter) 
53 Nonbreakaway pole or post (diameter unknown) 
54 Concrete traffic barrier 
55 Impact attenuator 
56 Other traffic barrier (includes guardrail) (specify) 
57 Fence 
58 Wall 
59 Building 
60 Ditch or culvert 
61 Ground 
62 Fire hydrant 
63 Curb 
64 Bridge 
68 Other fixed object (specify) 
69 Unknown fixed object 
70 Pass. car, light truck,van,or other vehicle not in-transport 
71 Medium/heavy truck or bus not in-transport 
72 Pedestrian 
73 Cyclist or cycle 
74 Other nonmotorist or conveyance (specify) 
75 Vehicle occupant 
76 Animal 
77 Train 
78 Trailer, disconnected in transport 
79 Object fell from vehicle in-transport 
88 Other nonfixed object (specify) 
89 Unknown nonfixed object 
98 Other event (specify) 
99 Unknown event or object 

Class Of Vehicle (Second Listing) 

Definition: This variable describes the class of vehicle for the second vehicle listed on the Case 
Form Events tab (if the collision was between two vehicles). This represents the same attribute as 
that found in the General Vehicle Data Set (“Class Of Vehicle” variable) and that found in the 
Vehicle Exterior Data Set (“Class Of Vehicle” variable). This classification is based on the size of 
the vehicle. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include police and other vehicle photographs. Partially determined by VIN information (size-based 
information). 

LTCCS Analytical User's Manual Events Data Set • 177 


Variable Definitions and Codes - Events Data Set 

Cross Reference: Identical to GeneralVehicle.GVEVehicleClass, if 
Events.EVEObjectContact<31 when applicable. Identical to VehicleExterior.VEXVehicleClass if 
Events.EVEObjectContact<31 when applicable. 

Variable Name: ClassVehicle2 

Attribute Codes 

Code Meaning 

0 Not a motor vehicle 
1 Subcompact/mini (wheelbase < 254 cm) 
2 Compact (wheelbase >= 254 but < 265 cm) 
3 Intermediate (wheelbase >= 265 but < 278 cm) 
4 Full Size (wheelbase >= 278 but < 291 cm) 
5 Largest (wheelbase >= 291 cm) 
9 Unknown passenger car size 
14 Compact utility vehicle 
15 Large utility vehicle (<= 4,536 kg GVWR) 
16 Utility station wagon (<= 4,536 kg GVWR) 
19 Unknown utility type 
20 Minivan (<= 4,536 kg GVWR) 
21 Large van (<= 4,536 kg GVWR) 
24 Van Based school bus (<= 4,536 kg GVWR) 
28 Other van type (<= 4,536 kg GVWR) 
29 Unknown van type (<= 4,536 kg GVWR) 
30 Compact pickup truck (<= 4,536 kg GVWR) 
31 Large pickup truck (<= 4,536 kg GVWR) 
38 Other pickup truck type (<= 4,536 kg GVWR) 
39 Unknown pick up truck (<=4,536 kg GVWR) 
45 Other light truck (<= 4,536 kg GVWR) 
48 Unknown light truck type (<= 4,536 kg GVWR) 
49 Unknown light vehicle type 
50 School bus (excludes van based)(>4,536 kg GVWR) 
58 Other bus (>4,536 kg GVWR) 
59 Unknown bus type 
60 Truck (>4,536 kg GVWR) 
67 Tractor without trailer 
68 Tractor-trailer(s) 
78 Unknown medium/heavy truck type 
79 Unknown light/medium/heavy truck type 
80 Motored cycle 
90 Other vehicle 
99 Unknown 


General Area Of Damage (Second Vehicle Listed) 

Definition: This variable describes the general area of damage on the second vehicle (if the 
collision was between two vehicles). 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include on-scene vehicle photographs. 

LTCCS Analytical User's Manual Events Data Set • 178 


Variable Definitions and Codes - Events Data Set 

Cross Reference: Related to CDCCrush.DeformLocation and CDCCrush.DamageLocation. 
Variable Name: DamageArea2 

Attribute Codes 
Code Meaning 
0 Not a motor vehicle 
9 Unknown 
B Back/Bk of unit with cargo area-rear of trailer or straight truck* 
C Rear of cab 
D Back (rear of tractor) 
F Front 
L Left Side 
N Noncollision 
R Right Side 
T Top 
U Undercarriage 
V Front of cargo area 

‘B’ represents ‘Back’ for a CDS vehicle, ‘Bk of unit with cargo area-rear of trailer or 
straight truck’ for a truck. 

LTCCS Analytical User's Manual Events Data Set • 179 


Variable Definitions and Codes - FactorAssessment Data Set 

FactorAssessment Data Set 

The FactorAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the FactorAssessment data set with other vehicle level data sets. This 
data set also contains the following variables: 

No Traffic Flow Factors 

Definition: This variable establishes whether or not there are no traffic flow interruption factors 
relevant to the crash. (This variable was originally an attribute choice under the variable “Traffic 
Flow Interruption Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Cross Reference: Identical to the opposite of Overview.Traffic. Related to 
Environment.FlowRestrictions (0 “No restrictions”). 

Variable Name: NoTraffic 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Previous Crash Nearby 

Definition: This variable establishes whether or not traffic flow at the crash site is interrupted by 
a previous crash located near this site. (This variable was originally an attribute choice under the 
variable “Traffic Flow Interruption Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Cross Reference: Related to DriverRecognitionDistraction.ADDPreviousCrash. Related to 
Enviornment.FlowRestrictions (3 “Prior crash”). 

Variable Name: AFTPreviousCrash 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - FactorAssessment Data Set 

Construction Work Zone 

Definition: This variable establishes whether or not traffic flow at the crash site is interrupted as 
a result of the crash site being located in a construction work zone. (This variable was originally 
an attribute choice under the variable “Traffic Flow Interruption Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Cross Reference: Related to Environment.FlowRestrictions (1 “Work zone”). 

Variable Name: ConstructionZone 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Emergency Vehicle Approaching 

Definition: This variable establishes whether or not traffic flow at the crash site is interrupted as 
a result of an emergency vehicle approaching from either direction. (This variable was originally 
an attribute choice under the variable “Traffic Flow Interruption Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview and the police report. Secondary data sources include 
interviews with other vehicle occupants, witnesses, other drivers, and surrogate interviews with 
family members/friends. 

Variable Name: EmergencyVehicle 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Rush Hour Congestion 

Definition: This variable establishes whether or not traffic flow at the crash site is interrupted as 
a result of rush hour traffic congestion. (This variable was originally an attribute choice under the 
variable “Traffic Flow Interruption Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Cross Reference: Related to Environment.FlowRestriction (4 “Congestion”). 

Variable Name: RushHour 

LTCCS Analytical User's Manual FactorAssessment Data Set • 181 


Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Traffic Flow Interruption 

Definition: This variable establishes whether or not traffic flow at the crash site is interrupted as 
a result of a factor not described in the other traffic flow variables. (This variable was originally an 
attribute choice under the variable “Traffic Flow Interruption Factors” and was the “Other 
(specify):” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Variable Name: OtherTraffic 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Traffic Flow Interruption – Specify 

Definition: This variable documents the “specify” text that was included where the “Other Traffic 
Flow Interruption” variable (above) was coded as being present for this driver. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources are the driver interview, the police report, and researcher on-scene investigation. 
Secondary data sources include interviews with other vehicle occupants, witnesses, other drivers, 
and surrogate interviews with family members/friends. 

Variable Name: OtherTrafficSpecify 

Attribute Codes 

Code Meaning 

* Text 
Vehicle Defect Count 

Definition: This variable documents the total number of vehicle condition-related factors coded 
to this vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Cross Reference: Computed from the following variables from the FactorAssessment data set: 
LoadObstructedView, DesignedObstructedView, OtherViewObstruction, TireFailure, 
BrakeFailure, TransmissionFailure, EngineProblem, OtherDefect, TireDeficiency, 

LTCCS Analytical User's Manual FactorAssessment Data Set • 182 


Variable Definitions and Codes - FactorAssessment Data Set 

BrakesOutOfAdjustment, BrakesInoperative, BrakesSystemDeficiency, VehicleOverweight, 
VehicleLightingDeficiency, CargoLoadSecurement, SuspensionFrameDeficiency, 
TowingUnitProblem, ReflectiveTapeMissingObscured, FuelSystemProblem, ExhaustLeak, 
SteeringWheelProblem. Elaborates on Overview.VehicleState. 

Variable Name: VehicleDefectCount 

Attribute Codes 
Code0-6 
7 
99 
Meaning 
Count of vehicle defects present 
No driver present 
Unknown 

View Obstruction – Related To Load 

Definition: This variable establishes whether or not the driver experiences a view obstruction 
that is related to the vehicle’s load. Typically in this circumstance, the obstruction is related to 
oversize cargo. Less frequently occurring however, is the circumstance where the obstruction is 
related to improper loading of the cargo. Both of these situations are included in this designation. 
(This variable was originally an attribute choice under the variable “Vehicle Condition Related 
Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: LoadObstructedView 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

View Obstruction – Related To Vehicle Design 

Definition: This variable establishes whether or not the driver experiences a view obstruction 
that is related to vehicle design (e.g. view blocked by upper A-pillar). (This variable was originally 
an attribute choice under the variable “Vehicle Condition Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: DesignedObstructedView 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - FactorAssessment Data Set 

View Obstruction - Other 

Definition: This variable establishes whether or not the driver experiences a view obstruction 
that is related to a factor not described in the other view obstruction variables. (This variable was 
originally an attribute choice under the variable “Vehicle Condition Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: OtherViewObstruction 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Tire Malfunction 

Definition: This variable establishes whether or not the vehicle experiences a tire malfunction 

(e.g. blowout, airout, etc.) during the precrash phase. (This variable was originally an attribute 
choice under the variable “Vehicle Condition Related Factors.”) 
Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: TireFailure 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Braking System Malfunction 

Definition: This variable establishes whether or not the vehicle experiences a braking system 
malfunction during the precrash phase. NOTE: Degraded braking performance (i.e. out-ofadjustment) is coded under the “Brakes Out-Of-Adjustment” variable. (This variable was originally 
an attribute choice under the variable “Vehicle Condition Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: BrakeFailure 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - FactorAssessment Data Set 

Transmission Malfunction 

Definition: This variable establishes whether or not the vehicle experiences a transmission 
malfunction during the precrash phase. (This variable was originally an attribute choice under the 
variable “Vehicle Condition Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: TransmissionFailure 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Engine Problem 

Definition: This variable establishes whether or not the vehicle experiences an engine-related 
problem during the precrash phase. Examples of engine-related problems include stalling, 
missing, and throttle problems. (This variable was originally an attribute choice under the variable 
“Vehicle Condition Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: EngineProblem 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Other Vehicle Condition 

Definition: This variable establishes whether or not the vehicle experiences a problem/exhibits a 
condition during the precrash phase that is relevant to crash occurrence, but is not described by 
other vehicle condition variables. (This variable was originally an attribute choice under the 
variable “Vehicle Condition Related Factors” and was the “Other (specify):” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

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Variable Definitions and Codes - FactorAssessment Data Set 

Variable Name: OtherDefect 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Vehicle Condition – Specify 

Definition: This variable documents the “specify” text that was included where the “Other 
Vehicle Condition” variable (above) was coded as being present for this driver. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: OtherDefectSpecify 

Attribute Codes 

Code Meaning 

* Text 
Tire Deficiency 

Definition: This variable establishes whether or not the vehicle had a tire deficiency prior to the 
crash event (e.g. low tread depth on one or more tires). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Cross Reference: Related to IntvwDrCondition.Tires, values will differ in part due to Interview 
vs. Researcher determined values. 

Variable Name: TireDeficiency 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Brakes Out-Of-Adjustment 

Definition: This variable establishes whether or not any of the vehicle’s brakes were out-ofadjustment during the precrash phase. This variable applies only to heavy trucks. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the Level 1 vehicle inspection results, the police report, and the driver 
interview. 

Variable Name: BrakesOutOfAdjustment 

LTCCS Analytical User's Manual FactorAssessment Data Set • 186 


Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Brakes Inoperative 

Definition: This variable establishes whether or not any of the vehicle’s brakes were inoperative 
during the precrash phase. This variable applies only to heavy trucks. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: BrakesInoperative 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Brake System Deficiency 

Definition: This variable establishes whether or not there were any braking system deficiencies 
prior to the crash that are not described in the other braking variables. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Cross Reference: Related to IntvwDrCondition.Brakes, values will differ in part due to Interview 
vs. Researcher determined values. 

Variable Name: BrakesSystemDeficiency 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Vehicle Overweight 

Definition: This variable establishes whether or not the vehicle was overweight prior to the 
precrash phase. This variable applies to heavy trucks only, and has to do with local ordinances as 
they relate to a truck’s GVWR (gross vehicle weight rating). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. 

LTCCS Analytical User's Manual FactorAssessment Data Set • 187 


Variable Definitions and Codes - FactorAssessment Data Set 

Cross Reference: Related to the sum of TruckExterior.CMDBCargoWeight and 
TruckExterior.TEXEmptyWeight being greater than TruckExterior.TotalGVWR. Related to sum of 
TruckUnits.TUNEmptyWeight and TruckUnits.TUNCargoWeight being greater than 
TruckUnits.GVWR. The TruckUnits data set looks at each unit individually whereas TruckExterior 
looks at the truck as a whole. 

Variable Name: VehicleOverweight 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Vehicle Lighting Deficiency 

Definition: This variable establishes whether or not the vehicle had a lighting system deficiency 
during the precrash phase (e.g. a turn signal or headlight out). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Cross Reference: Related to IntvwDrCondition.Lights, values will differ in part due to Interview 
vs. Researcher determined values. 

Variable Name: VehicleLightingDeficiency 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Cargo/Load Securement Related Problem 

Definition: This variable establishes whether or not there were any vehicle problems related to 
load securement or to the cargo itself prior to the crash event. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: CargoLoadSecurement 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual FactorAssessment Data Set • 188 


Variable Definitions and Codes - FactorAssessment Data Set 

Suspension/Frame Deficiency 

Definition: This variable establishes whether or not the vehicle had a suspension or frame 
deficiency prior to the crash event. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Cross Reference: Related to IntvwDrCondition.Suspension, values will differ in part due to 
Interview vs. Researcher determined values. 

Variable Name: SuspensionFrameDeficiency 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Towing Unit Problem 

Definition: This variable establishes whether or not the there was a problem with the towing unit 
of an articulated vehicle (this variable usually applies only to trucks). 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: TowingUnitProblem 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Reflective Tape Missing/Obscured 

Definition: This variable establishes whether or not the vehicle’s reflective tape was missing or 
obscured in some manner. This variable only applies to heavy trucks and has to do with FMCSA 
reflective tape requirements. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, and the 
police report. 

Cross Reference: Related to a combination of the following variables in the TruckUnits data set: 
RearTapeCondition, SideTapeCondition, ReflectTapeType, UnderrideTapePeel, RearTapePeel, 
SideTapePeel. 

Variable Name: ReflectiveTapeMissingObscured 

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Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Fuel System Problem 

Definition: This variable establishes whether or not the vehicle experienced a problem that is 
related to its fuel system during the precrash phase. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: FuelSystemProblem 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Exhaust Leak 

Definition: This variable establishes whether or not the vehicle experienced an exhaust leak 
during the precrash phase. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview, 
interviews with other vehicle occupants, witnesses, and other vehicle drivers. 

Variable Name: ExhaustLeak 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Steering Wheel Problem 

Definition: This variable establishes whether or not the vehicle experienced a steering-related 
problem during the precrash phase. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher vehicle inspection, the Level 1 vehicle inspection results, the 
police report, and the driver interview. Secondary data sources include the carrier interview and 
interviews with other vehicle occupants. 

Cross Reference: Related to IntvwDrCondition.Steering, values will differ in part due to 
Interview vs. Researcher determined values. 

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Variable Definitions and Codes - FactorAssessment Data Set 

Variable Name: SteeringWheelProblem 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Median Width 

Definition: This variable documents the measured median width when a roadway geometry 
factor has been identified involving a crossover. This value is provided when the “Roadway 
Geometry” variable is coded as being present. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: MedianWidth 

Attribute Codes 
Code* 
8887.0 
Meaning 
Actual value (m) 
Not applicable 

9999999999.0 Unknown 

Radius Of Curvature 

Definition: This variable documents the measured radius of curvature for the roadway on which 
the crash occurred. This value is specified when the “Roadway Geometry (Curve)” variable is 
coded as being present. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: AFTCurveRadius 

Attribute Codes 
Code* 
8887.0 
9999 
Meaning 
Actual value (m) 
Not applicable 
Unknown 
Sight Distance 

Definition: This variable documents the measured sight distance when the “Road Sight Distance 
Insufficient” variable is coded as being present. 

LTCCS Analytical User's Manual FactorAssessment Data Set • 191 


Variable Definitions and Codes - FactorAssessment Data Set 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: SightDistance 

Attribute Codes 
Code* 
8887.0 
9999 
Meaning 
Actual value (m) 
Not applicable 
Unknown 

AASHTO Recommended Sight Distance 

Definition: This variable documents the AASHTO recommended sight distance for this vehicle in 
the precrash phase. This value is specified when the “Road Sight Distance Insufficient” variable is 
coded as being present. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data source is the AASHTO (American Association of State Highway and Transportation Officials) 
document “A Policy on Geometric Design of Highways and Streets (4th edition),” used in 
conjunction with the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: AASHTORecommended 

Attribute Codes 

Code Meaning 

* Actual value (m) 
8887.0 Not applicable 
9999 Unknown 
Roadway Factor Count 

Definition: This variable documents the number of roadway-related factors that were coded for 
this vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Cross Reference: Computed from the following variables in the FactorAssessment data set: 
SignsMissing, ObjectObscured, VehicleObscured, RoadGeometry, InsufficientSight, 
BadLaneMarkings, NarrowShoulders, NarrowRoad, RampSpeed, PoorCondition, SlickSurface, 
UnderWater, WashedOut, OtherProblem. Elaborates on Overview.Roadway. 

Variable Name: RoadwayFactorCount 

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Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code0-6 
77 
99 
Meaning 
Count of roadway factors present 
No driver present 
Unknown 

Traffic Signs/Signals Missing 

Definition: This variable documents whether or not traffic signs/signals have been removed from 
the designated location and are not physically present. The removal can be associated with either 
a repair function or vandalism. (This variable was originally an attribute choice under the variable 
“Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: SignsMissing 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Roadway View Obstruction 

Definition: This variable documents whether or not there is a view obstruction associated with 
roadway design including such added devices as signal boxes, signal light support poles, 
guardrails, and crash cushions. (This variable was originally an attribute choice under the variable 
“Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: ObjectObscured 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

View Obstructed By Other Vehicle 

Definition: This variable documents whether or not the driver’s view is obstructed by an 
intervening vehicle. (This variable was originally an attribute choice under the variable “Roadway 
Related Factors.”) 

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Variable Definitions and Codes - FactorAssessment Data Set 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: VehicleObscured 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Road Geometry 

Definition: This variable documents whether or not roadway geometry, usually in the form of a 
curve, is relevant to the crash. (This variable was originally an attribute choice under the variable 
“Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: RoadGeometry 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Road Sight Distance Insufficient 

Definition: This variable documents whether or not the measured sight distance on this roadway 
does not meet the standard as specified in AASHTO. (This variable was originally an attribute 
choice under the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: InsufficientSight 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

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Variable Definitions and Codes - FactorAssessment Data Set 

Lane Delineation Problem 

Definition: This variable documents whether or not the driver encounters difficulty as a result of 
lane delineation. The delineation markings in this circumstance may not be present, may be worn 

(i.e. reduced visibility), or may be covered in some manner (e.g. gravel, debris, etc.). (This 
variable was originally an attribute choice under the variable “Roadway Related Factors.”) 
Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: BadLaneMarkings 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 


Narrow Shoulders 

Definition: This variable documents whether or not the driver experiences a problem as a result 
of the shoulder, which is not sufficiently wide. While circumstances will vary depending on 
location, shoulder width should be less than 1.5 meters to qualify for this designation. (This 
variable was originally an attribute choice under the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: NarrowShoulders 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Narrow Road 

Definition: This variable documents whether or not the driver experiences a problem as a result 
of insufficient roadway width. While circumstances will vary depending on the type of roadway, 
two-lane roadways should be less than 20 feet (6.1 meters) in width to qualify for this designation. 
(This variable was originally an attribute choice under the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: NarrowRoad 

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Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Ramp Speed 

Definition: This variable documents whether or not the posted ramp entrance/exit speed is 
inappropriate. This includes circumstances where the posted speed is adequate for one class of 
vehicle, but is too high for another class of vehicle (e.g. adequate for automobiles, but too high for 
large trucks). (This variable was originally an attribute choice under the variable “Roadway 
Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: RampSpeed 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Roadway Condition 

Definition: This variable documents whether or not the driver encounters a problem as a result 
of a roadway maintenance condition. Specific areas of concern include potholes, 
deteriorated/broken road edges, washboard areas, and depressions where a localized area of the 
surface has sunk several inches or more. (This variable was originally an attribute choice under 
the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: PoorCondition 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

Slick Surface 

Definition: This variable documents whether or not the driver encounters a low friction surface 
most commonly associated with an icy condition. There are several other circumstances that can 
be associated with a pronounced reduction of friction values. These include loose gravel/sand 
spread over a paved surface and oil build-ups. Typically, wet surfaces are not included in this 

LTCCS Analytical User's Manual FactorAssessment Data Set • 196 


Variable Definitions and Codes - FactorAssessment Data Set 

designation unless moisture adds to an existing condition such as an oil build-up. (This variable 
was originally an attribute choice under the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: SlickSurface 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 


Road Under Water 

Definition: This variable documents whether or not one or more travel lane is completely 
covered with water. (This variable was originally an attribute choice under the variable “Roadway 
Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Cross Reference: Related to Environment.FlowRestrictions (2 “Roadway Immersed”). 

Variable Name: UnderWater 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 


Road Washed Out 

Definition: This variable documents whether or not a portion of the roadway collapses/washes 
away as a result of exposure to running water. (This variable was originally an attribute choice 
under the variable “Roadway Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: WashedOut 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

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Other Roadway Related Factor 

Definition: This variable documents whether or not the driver encounters a roadway problem 
that is not described by the other roadway-related variables. (This variable was originally an 
attribute choice under the variable “Roadway Related Factors” and was the “Other (specify):” 
attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: OtherProblem 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Roadway Related Factor – Specify 

Definition: This variable documents the “specify” text that was included where the “Other 
Roadway Related Factor” variable (above) was coded as being present for this driver. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the scaled schematic, scene measurement log, scene photographs, General 
Vehicle Form, and the police report. Secondary sources include the driver interviews and 
interviews with other vehicle occupants and witnesses. 

Variable Name: OtherProblemSpecify 

Attribute Codes 

Code Meaning 

* Text 
Weather Factors Count 

Definition: This variable documents the number of weather related factors that were coded for 
this vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Cross Reference: Computed from the following variables from the FactorAssessment data set: 
AFTRain, AFTSnow, AFTFog, WindGust, AFTHail, AFTSleet, OtherWeather. Elaborates on 
Overview.Weather. 

Variable Name: WeatherCount 

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Variable Definitions and Codes - FactorAssessment Data Set 

Attribute Codes 
Code Meaning 

0-6 Count of weather factors present 
7 No driver present 
9 Unknown 

Rain 

Definition: This variable establishes whether or not it was raining at the time of the crash. (This 
variable was originally an attribute choice under the variable “Weather Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: AFTRain 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Snow 

Definition: This variable establishes whether or not it was snowing at the time of the crash. (This 
variable was originally an attribute choice under the variable “Weather Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: AFTSnow 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Fog 

Definition: This variable establishes whether or not the driver was operating in fog at the time of 
the crash. (This variable was originally an attribute choice under the variable “Weather Related 
Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

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Variable Name: AFTFog 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Wind Gust 

Definition: This variable establishes whether or not a wind gust occurs prior to the crash and 
has some relevance to the crash. (This variable was originally an attribute choice under the 
variable “Weather Related Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: WindGust 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Hail 

Definition: This variable establishes whether or not the driver was operating in hail at the time of 
the crash. (This variable was originally an attribute choice under the variable “Weather Related 
Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Cross Reference: Identical to Environment.ENVHail. 

Variable Name: AFTHail 

Attribute Codes 

Code0 
1 
Meaning 
Absent 
Present 
Sleet 

Definition: This variable establishes whether or not the driver was operating in sleet at the time 
of the crash. (This variable was originally an attribute choice under the variable “Weather Related 
Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 

LTCCS Analytical User's Manual FactorAssessment Data Set • 200 


Variable Definitions and Codes - FactorAssessment Data Set 

Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: AFTSleet 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Weather Related Factor 

Definition: This variable establishes whether or not there is a relevant weather related factor 
that is not described in the other weather variables. (This variable was originally an attribute 
choice under the variable “Weather Related Factors” and was the “Other (specify):” attribute 
choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: OtherWeather 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Weather Related Factor – Specify 

Definition: This variable documents the “specify” text that was included where the “Other 
Weather Related Factor” variable (above) was coded as being present for this driver. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 
Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. 

Variable Name: OtherWeatherSpecify 

Attribute Codes 

Code Meaning 

* Text 
Environmental Factor Count 

Definition: This variable documents the number of environmental factors that were coded for 
this vehicle. 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include the police report and local weather information provided by the NASS 

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Variable Definitions and Codes - FactorAssessment Data Set 

Researcher. Secondary data sources include driver interviews and interviews with other vehicle 
occupants, witnesses, and other drivers. (A derived variable) 

Cross Reference: Computed from the following variables in the FactorAssessment data set: 
Glare, BlowingDebris, Smoke, OtherChangeSpecify. Elaborates on Overview.OVEEnvironment. 

Variable Name: EnvironmentCount 
Attribute Codes 

Code0-6 
7 
9 
Meaning 
Count of environment attributes present 
No driver present 
Unknown 
Glare 

Definition: This variable establishes whether or not glare in some form is relevant to the crash 
for this driver. Examples include headlight glare, sun glare, and reflected glare (i.e. sun reflecting 
off a windshield or other metal component). (This variable was originally an attribute choice under 
the variable “Other Environmental Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher on-scene investigation, the police report, and local weather 
information provided by the NASS Researcher. Secondary data sources include driver interviews 
and interviews with other vehicle occupants, witnesses, and other drivers. 

Variable Name: Glare 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
Blowing Debris 

Definition: This variable establishes whether or not this driver is exposed to some form of 
blowing debris. Examples include paper, cardboard boxes, and tree limbs. (This variable was 
originally an attribute choice under the variable “Other Environmental Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher on-scene investigation, the police report, and local weather 
information provided by the NASS Researcher. Secondary data sources include driver interviews 
and interviews with other vehicle occupants, witnesses, and other drivers. 

Variable Name: BlowingDebris 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual FactorAssessment Data Set • 202 


Variable Definitions and Codes - FactorAssessment Data Set 

Smoke 

Definition: This variable establishes whether or not the driver’s view is obscured by the 
presence of smoke (e.g. smoke from a grass fire, house fire, or forest fire). (This variable was 
originally an attribute choice under the variable “Other Environmental Factors.”) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher on-scene investigation, the police report, and local weather 
information provided by the NASS Researcher. Secondary data sources include driver interviews 
and interviews with other vehicle occupants, witnesses, and other drivers. 

Variable Name: Smoke 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 
No Driver Present 

Definition: This variable establishes whether or not there was no driver in the driver’s seated 
position at the time of the crash. (This variable was originally an attribute choice under the 
variable “Weather Related Factors.”) 

Source: Determined by Case Reviewer using all available inputs. 

Variable Name: AFTNoDriver 

Attribute Codes 
Code0 
1 
Meaning 
Absent 
Present 

Other Sudden Change In Ambience 

Definition: This variable establishes whether or not the driver experiences a problem as a result 
of a sudden change in ambience. (This variable was originally an attribute choice under the 
variable “Other Environmental Factors” and was the “Other Sudden Change In Ambience 
(specify):” attribute choice.) 

Source: Determined by the Case Reviewer using all available information inputs. The primary 
data sources include researcher on-scene investigation, the police report, and local weather 
information provided by the NASS Researcher. Secondary data sources include driver interviews 
and interviews with other vehicle occupants, witnesses, and other drivers. 

Variable Name: OtherChangeSpecify 

Attribute Codes 

Code Meaning 

0 Absent 
1 Present 

LTCCS Analytical User's Manual FactorAssessment Data Set • 203 


Variable Definitions and Codes - GeneralVehicle Data Set 

GeneralVehicle Data Set 

The GeneralVehicle data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the GeneralVehicle data set with other vehicle level data sets. This 
data set also contains the following variables: 

Vehicle Make 

Definition: This vehicle identifies the vehicle make for this vehicle. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include police report, interview, and other vehicle photographs. 

Cross Reference: Identical to Overview.OVEMake. Congruent with GeneralVehicle.VINMake, 
values will differ due to VIN vs. Researcher determined values. 

Variable Name: GVEMake 

Attribute Codes 
Code Meaning 
1 AMC 
2 JEEP / KAISER-JEEP 
3 AM GENERAL 
6 CHRYSLER 
7 DODGE 
8 IMPERIAL 
9 PLYMOUTH 
10 EAGLE 
12 FORD 
13 LINCOLN 
14 MERCURY 
18 BUICK 
19 CADILLAC 
20 CHEVROLET 
21 OLDSMOBILE 
22 PONTIAC 
23 GMC 
24 SATURN 
25 GRUMMAN 
29 OTHER DOMESTIC MANUFACTURER (light vehicles) 
30 VOLKSWAGEN 
31 ALFA ROMEO 
32 AUDI 
33 AUSTIN / AUSTIN HEALEY 
34 BMW 
35 NISSAN / DATSUN 
36 FIAT 
37 HONDA 
38 ISUZU 
39 JAGUAR 

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Variable Definitions and Codes - GeneralVehicle Data Set 

40 LANCIA 
41 MAZDA 
42 MERCEDES BENZ 
43 MG 
44 PEUGEOT 
45 PORSCHE 
46 RENAULT/AMC 
47 SAAB 
48 SUBARU 
49 TOYOTA 
50 TRIUMPH 
51 VOLVO 
52 MITSUBISHI 
53 SUZUKI 
54 ACURA 
55 HYUNDAI 
56 MERKUR 
57 YUGO 
58 INFINITI 
59 LEXUS 
60 DAIHATSU 
61 STERLING 
62 LAND ROVER 
63 KIA 
64 DAEWOO 
65 MINI 
69 OTHER FOREIGN MANUFACTURER (light vehicles) 
70 BSA 
71 DUCATI 
72 HARLEY-DAVIDSON 
73 KAWASAKI 
74 MOTO-GUZZI 
75 NORTON 
76 YAMAHA 
78 OTHER MAKE MOPED 
79 OTHER MAKE MOTORED CYCLE 
80 BROCKWAY 
81 DIAMOND REO/REO 
82 FREIGHTLINER/WHITE 
83 FWD 
84 INTERNATIONAL HARVESTER/NAVISTAR 
85 KENWORTH 
86 MACK 
87 PETERBILT 
88 IVECO/MAGIRUS 
98 OTHER MAKE (med/heavy truck/bus or "other") 
99 UNKNOWN MANUFACTURER 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 205 


Variable Definitions and Codes - GeneralVehicle Data Set 

Vehicle Model (listed with Vehicle Make) 

Definition: This variable identifies the vehicle model for this vehicle. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include police report, interview, and other vehicle photographs. 

Cross Reference: Identical to Overview.OVEModel. Congruent with GeneralVehicle.VINModel, 
values will differ due to VIN vs. Researcher determined values. 

Variable Name: GVEModel (with GVEMake) 

Attribute Codes 

MAKE MODEL 

Code Meaning Code Meaning 

1 AMC 1 RAMBLER/AMERICAN 

1 AMC 2 REBEL/MATADOR 

1 AMC 3 AMBASSADOR 

1 AMC 4 PACER 

1 AMC 5 AMX 

1 AMC 6 JAVELIN 

1 AMC 7 HORNET/CONCORD 

1 AMC 8 SPIRIT/GREMLIN 

1 AMC 9 EAGLE 

1 AMC 10 EAGLE SX-4 

1 AMC 398 OTHER AUTOMOBILE 

1 AMC 399 UNKNOWN AUTOMOBILE 

1 AMC 999 UNKNOWN VEHICLE 

2 JEEP / KAISER-JEEP 401 CJ-2/CJ-3/CJ-4 

2 JEEP / KAISER-JEEP 402 CJ-5/CJ-6/CH-7/CH-8 

2 JEEP / KAISER-JEEP 403 YJ-SERIES 

2 JEEP / KAISER-JEEP 404 CHEROKEE (1984 ON) 

2 JEEP / KAISER-JEEP 405 LIBERTY 

2 JEEP / KAISER-JEEP 421 CHEROKEE (1963 - 1983) 

2 JEEP / KAISER-JEEP 431 GRAND WAGONEER 

2 JEEP / KAISER-JEEP 481 PICKUP 

2 JEEP / KAISER-JEEP 482 COMANCHE 

2 JEEP / KAISER-JEEP 498 OTHER LIGHT TRUCK 

2 JEEP / KAISER-JEEP 499 UNKNOWN LIGHT TRUCK 

2 JEEP / KAISER-JEEP 999 UNKNOWN VEHICLE 

3 AM GENERAL 401 DISPATCHER 

3 AM GENERAL 421 HUMMER 

3 AM GENERAL 466 DISPATCHER 

3 AM GENERAL 498 OTHER LIGHT TRUCK 

3 AM GENERAL 499 UNKNOWN LIGHT TRUCK 

3 AM GENERAL 884 MEDIUM/HEAVY TRUCK 

3 AM GENERAL 898 OTHER MEDIUM/HEAVY TRUCK 

3 AM GENERAL 899 UNKNOWN MEDIUM/HEAVY TRUCK 

3 AM GENERAL 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

3 AM GENERAL 983 BUS - REAR ENGINE/FLAT FRONT 

3 AM GENERAL 988 OTHER BUS 

3 AM GENERAL 989 UNKNOWN BUS TYPE 

3 AM GENERAL 999 UNKNOWN VEHICLE 

6 CHRYSLER 9 CORDOBA 

6 CHRYSLER 10 NEW YORKER FIFTH AVENUE ('89) 

6 CHRYSLER 10 NEWPORT 

6 CHRYSLER 13 RAMPAGE 2.2 (CAR BASED PICKUP) 

6 CHRYSLER 14 RWD ONLY-NEW YORKER/NEWPORT/5TH 

AVENUE/IMPERIAL 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 206 


Variable Definitions and Codes - GeneralVehicle Data Set 

6 CHRYSLER 14 NEW YORKER ('83-'90) 

6 CHRYSLER 14 NEW YORKER SALON 

6 CHRYSLER 14 NEW YORKER/E CLASS/IMPERIAL/5TH 
AVENUE 

6 CHRYSLER 15 LASER 

6 CHRYSLER 16 LEBARON 

6 CHRYSLER 17 LEBARON GTS/GTC 

6 CHRYSLER 18 INTREPID (CANADIAN) 

6 CHRYSLER 19 NEON (EXPORT) 

6 CHRYSLER 31 TC (MASERATI SPORT) 

6 CHRYSLER 35 CONQUEST 

6 CHRYSLER 41 CONCORDE 

6 CHRYSLER 42 LHS 

6 CHRYSLER 43 SEBRING 

6 CHRYSLER 44 CIRRUS 

6 CHRYSLER 51 300M 

6 CHRYSLER 52 PT CRUISER 

6 CHRYSLER 53 PROWLER 

6 CHRYSLER 54 PACIFICA 

6 CHRYSLER 55 CROSSFIRE 

6 CHRYSLER 398 OTHER AUTOMOBILE 

6 CHRYSLER 399 UNKNOWN AUTOMOBILE 

6 CHRYSLER 441 TOWN AND COUNTRY 

6 CHRYSLER 442 VOYAGER 

6 CHRYSLER 498 OTHER LIGHT TRUCK 

6 CHRYSLER 499 UNKNOWN LIGHT TRUCK 

6 CHRYSLER 999 UNKNOWN VEHICLE 

7 DODGE 1 DART 

7 DODGE 2 CORONET/CHARGER/MAGNUM 

7 DODGE 3 POLARA/MONACO/ROYAL MONACO 

7 DODGE 4 VIPER 

7 DODGE 5 CHALLENGER 

7 DODGE 6 ASPEN 

7 DODGE 7 DIPLOMAT 

7 DODGE 8 OMNI/CHARGER 

7 DODGE 9 MIRADA 

7 DODGE 10 ST REGIS 

7 DODGE 11 ARIES (K) 

7 DODGE 12 400 

7 DODGE 13 RAMPAGE 2.2, GT, SPORT 

7 DODGE 14 600 

7 DODGE 15 DAYTONA 

7 DODGE 16 LANCER 

7 DODGE 17 SHADOW 

7 DODGE 18 DYNASTY 

7 DODGE 19 SPIRIT 

7 DODGE 20 NEON 

7 DODGE 33 CHALLENGER (ALL IMPORTED) 

7 DODGE 34 COLT (EXCLUDES VISTA) 

7 DODGE 35 CONQUEST 

7 DODGE 39 STEALTH 

7 DODGE 40 MONACO 

7 DODGE 41 INTREPID 

7 DODGE 42 AVENGER 

7 DODGE 43 STRATUS 

7 DODGE 398 OTHER AUTOMOBILE 

7 DODGE 399 UNKNOWN AUTOMOBILE 

7 DODGE 401 RAIDER 

7 DODGE 421 RAMCHARGER 

7 DODGE 422 DURANGO 

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Variable Definitions and Codes - GeneralVehicle Data Set 

7 DODGE 441 VISTA 

7 DODGE 442 CARAVAN 

7 DODGE 461 B-SERIES VANS 

7 DODGE 462 SPRINTER 

7 DODGE 470 VAN DERIVATIVE 

7 DODGE 471 D50, COLT P/U, RAM 50/RAM 100 

7 DODGE 472 DAKOTA 

7 DODGE 481 D, W-SERIES PICKUP, W100-W350 

7 DODGE 482 RAM 

7 DODGE 498 OTHER LIGHT TRUCK 

7 DODGE 499 UNKNOWN LIGHT TRUCK 

7 DODGE 881 MEDIUM/HEAVY: CBE 

7 DODGE 882 MEDIUM/HEAVY: COE LOW ENGRY 

7 DODGE 883 MEDIUM/HEAVY: COE HIGH ENTRY 

7 DODGE 884 MEDIUM/HEAVY: UNKNOWN ENGINE 
LOCATION 

7 DODGE 890 MEDIUM/HEAVY: COE ENTRY POSITION 

UNKNOWN 

7 DODGE 898 OTHER MEDIUM/HEAVY TRUCK 

7 DODGE 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

7 DODGE 899 UNKNOWN MEDIUM/HEAVY TRUCK 

7 DODGE 981 MEDIUM BUS 

7 DODGE 988 OTHER BUS 

7 DODGE 989 UNKNOWN BUS TYPE 

7 DODGE 998 OTHER VEHICLE 

7 DODGE 999 UNKNOWN VEHICLE 

8 IMPERIAL 10 IMPERIAL 

8 IMPERIAL 398 OTHER AUTOMOBILE 

8 IMPERIAL 399 UNKNOWN AUTOMOBILE 

8 IMPERIAL 999 UNKNOWN VEHICLE 

9 PLYMOUTH 1 VALIANT/DUSTER/SCAMP 

9 PLYMOUTH 2 SATELLITE/BELVEDERE 

9 PLYMOUTH 3 FURY 

9 PLYMOUTH 4 GRAN FURY 

9 PLYMOUTH 5 BARRACUDA 

9 PLYMOUTH 6 VOLARE 

9 PLYMOUTH 7 CARAVELLE 

9 PLYMOUTH 8 HORIZON 

9 PLYMOUTH 11 RELIANT (K) 

9 PLYMOUTH 13 SCAMP (CAR BASED PICKUP) 

9 PLYMOUTH 17 SUNDANCE 

9 PLYMOUTH 19 ACCLAIM 

9 PLYMOUTH 20 NEON 

9 PLYMOUTH 31 CRICKET 

9 PLYMOUTH 32 ARROW 

9 PLYMOUTH 33 SAPPORO 

9 PLYMOUTH 34 CHAMP/COLT (EXCLUDES VISTA) 

9 PLYMOUTH 35 CONQUEST 

9 PLYMOUTH 37 LASER 

9 PLYMOUTH 38 BREEZE 

9 PLYMOUTH 39 PROWLER 

9 PLYMOUTH 398 OTHER AUTOMOBILE 

9 PLYMOUTH 399 UNKNOWN AUTOMOBILE 

9 PLYMOUTH 421 TRAILDUSTER 

9 PLYMOUTH 441 COLT VISTA 

9 PLYMOUTH 442 VOYAGER (MINIVAN) 

9 PLYMOUTH 461 VAN-FULLSIZE (B-SERIES) 

9 PLYMOUTH 471 ARROW PICKUP (FOREIGN) 

9 PLYMOUTH 498 OTHER LIGHT TRUCK 

9 PLYMOUTH 499 UNKNOWN LIGHT TRUCK 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 208 


Variable Definitions and Codes - GeneralVehicle Data Set 

9 PLYMOUTH 999 UNKNOWN VEHICLE 
10 EAGLE 34 SUMMIT 
10 EAGLE 37 TALON 
10 EAGLE 40 PREMIER 
10 EAGLE 41 VISION 
10 EAGLE 44 MEDALLION 
10 EAGLE 398 OTHER AUTOMOBILE 
10 EAGLE 399 UNKNOWN AUTOMOBILE 
10 EAGLE 441 SUMMIT WAGON 
10 EAGLE 498 OTHER LIGHT TRUCK 
10 EAGLE 499 UNKNOWN LIGHT TRUCK 
10 EAGLE 999 UNKNOWN VEHICLE 
12 FORD 1 FALCON 
12 FORD 2 FAIRLANE 
12 FORD 3 MUSTANG/MUSTANG II 
12 FORD 4 THUNDERBIRD (ALL SIZES) 
12 FORD 5 LTD II 
12 FORD 6 LTD/CUSTOM/GALAXIE (ALL SIZES) 
12 FORD 7 RANCHERO 
12 FORD 8 MAVERICK 
12 FORD 9 PINTO 
12 FORD 10 TORINO/GRAN TORINO/ELITE 
12 FORD 11 GRANADA 
12 FORD 12 FAIRMONT 
12 FORD 13 ESCORT/EXP 
12 FORD 15 TEMPO 
12 FORD 16 CROWN VICTORIA 
12 FORD 17 TAURUS 
12 FORD 18 PROBE 
12 FORD 31 ENGLISH FORD 
12 FORD 32 FIESTA 
12 FORD 33 FESTIVA 
12 FORD 34 LASER 
12 FORD 35 CONTOUR 
12 FORD 36 ASPIRE 
12 FORD 37 FOCUS 
12 FORD 38 GT 
12 FORD 398 OTHER AUTOMOBILE 
12 FORD 399 UNKNOWN AUTOMOBILE 
12 FORD 401 EXPLORER/BRONCO ii/BRONCO (-77) 
12 FORD 402 ESCAPE 
12 FORD 421 BRONCO-FULLSIZE 
12 FORD 422 EXPEDITION 
12 FORD 431 EXCURSION 
12 FORD 441 AEROSTAR 
12 FORD 442 WINDSTAR 
12 FORD 443 FREESTAR 
12 FORD 461 E-SERIES VANS 
12 FORD 470 VAN DERIVATIVE 
12 FORD 471 RANGER 
12 FORD 472 COURIER 
12 FORD 473 SPORT TRAC 
12 FORD 481 F-SERIES PICKUP 
12 FORD 498 OTHER LIGHT TRUCK 
12 FORD 499 UNKNOWN LIGHT TRUCK 
12 FORD 880 F450/550 PICKUP >4536 GVWR 
12 FORD 881 MEDIUM/HEAVY CBE 
12 FORD 882 MEDIUM/HEAVY COE LOW ENGRY 
12 FORD 883 MEDIUM/HEAVY COE HIGH ENTRY 

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Variable Definitions and Codes - GeneralVehicle Data Set 

12 FORD 884 MEDIUM/HEAVY: UNKNOWN ENGINE 
LOCATION 

12 FORD 890 MEDIUM/HEAVY: COE ENTRY POSITION 
UNKNOWN 

12 FORD 898 OTHER MEDIUM/HEAVY TRUCK 

12 FORD 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

12 FORD 899 UNKNOWN MEDIUM/HEAVY TRUCK 

12 FORD 981 MEDIUM BUS 

12 FORD 988 OTHER BUS 

12 FORD 989 UNKNOWN BUS TYPE 

12 FORD 998 OTHER VEHICLE 

12 FORD 999 UNKNOWN VEHICLE 

13 LINCOLN 1 CONTINENTAL/TOWN CAR 

13 LINCOLN 2 MARK 

13 LINCOLN 5 CONTINENTAL (82-ON) 

13 LINCOLN 11 VERSAILLES 

13 LINCOLN 12 LS 

13 LINCOLN 398 OTHER AUTOMOBILE 

13 LINCOLN 399 UNKNOWN AUTOMOBILE 

13 LINCOLN 401 AVIATOR 

13 LINCOLN 421 NAVIGATOR 

13 LINCOLN 481 BLACKWOOD 

13 LINCOLN 498 OTHER LIGHT TRUCK 

13 LINCOLN 499 UNKNOWN LIGHT TRUCK 

13 LINCOLN 999 UNKNOWN VEHICLE 

14 MERCURY 2 CYCLONE 

14 MERCURY 3 CAPRI-DOMESTIC 

14 MERCURY 4 COUGAR/XR7 

14 MERCURY 6 MARQUIS/MONTEREY 

14 MERCURY 8 COMET 

14 MERCURY 9 BOBCAT 

14 MERCURY 10 MONTEGO 

14 MERCURY 11 MONARCH 

14 MERCURY 12 ZEPHYR 

14 MERCURY 13 LYNX/LN-7 (82-83) 

14 MERCURY 15 TOPAZ 

14 MERCURY 17 SABLE 

14 MERCURY 31 CAPRI-FOREIGN 

14 MERCURY 33 PANTERA 

14 MERCURY 36 TRACER 

14 MERCURY 37 MYSTIQUE 

14 MERCURY 38 COUGAR 

14 MERCURY 39 MARAUDER 

14 MERCURY 398 OTHER AUTOMOBILE 

14 MERCURY 399 UNKNOWN AUTOMOBILE 

14 MERCURY 401 MOUNTAINEER 

14 MERCURY 443 VILLAGER 

14 MERCURY 444 MONTEREY (2004+) 

14 MERCURY 498 OTHER LIGHT TRUCK 

14 MERCURY 499 UNKNOWN LIGHT TRUCK 

14 MERCURY 999 UNKNOWN VEHICLE 

18 BUICK 1 SPECIAL/SKYLARK (thru 1972) 

18 BUICK 2 LESABRE/CENTURION/WILDCAT 

18 BUICK 3 ELECTRA/ELECTRA 225/PARK AVENUE (91ON) 

18 BUICK 4 ROADMASTER 

18 BUICK 5 RIVIERA 

18 BUICK 7 CENTURY 

18 BUICK 8 APOLLO/SKYLARK (73-76) 

18 BUICK 10 REGAL 

18 BUICK 12 SKYHAWK 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 210 


Variable Definitions and Codes - GeneralVehicle Data Set 

18 BUICK 15 SKYLARK (76-85) 
18 BUICK 18 SOMERSET(85-87)/SKYLARK(86-ON) 
18 BUICK 20 REGAL (FWD) 
18 BUICK 21 REATTA 
18 BUICK 31 OPEL KADETT 
18 BUICK 32 OPEL MANTA 
18 BUICK 33 OPEL GT 
18 BUICK 34 OPEL ISUZU 
18 BUICK 398 OTHER AUTOMOBILE 
18 BUICK 399 UNKNOWN AUTOMOBILE 
18 BUICK 401 RENDEZVOUS 
18 BUICK 402 RAINIER 
18 BUICK 498 OTHER LIGHT TRUCK 
18 BUICK 499 UNKNOWN LIGHT TRUCK 
18 BUICK 999 UNKNOWN VEHICLE 
19 CADILLAC 3 DEVILLE/FLEETWOOD 
19 CADILLAC 4 LIMOUSINE 
19 CADILLAC 5 ELDORADO 
19 CADILLAC 6 COMMERCIAL SERIES 
19 CADILLAC 9 ALLANTE 
19 CADILLAC 14 SEVILLE 
19 CADILLAC 16 CIMARRON 
19 CADILLAC 17 CATERA 
19 CADILLAC 18 CTS 
19 CADILLAC 19 XLR 
19 CADILLAC 20 SRX 
19 CADILLAC 398 OTHER AUTOMOBILE 
19 CADILLAC 399 UNKNOWN AUTOMOBILE 
19 CADILLAC 421 ESCALADE 
19 CADILLAC 431 ESCALADE ESV 
19 CADILLAC 480 ESCALADE EXT 
19 CADILLAC 498 OTHER LIGHT TRUCK 
19 CADILLAC 498 UNKNOWN LIGHT TRUCK 
19 CADILLAC 999 UNKNOWN VEHICLE 
20 CHEVROLET 1 CHEVELLE/MALIBU (83-) 
20 CHEVROLET 2 IMPALA/CAPRICE 
20 CHEVROLET 4 CORVETTE 
20 CHEVROLET 6 CORVAIR 
20 CHEVROLET 7 EL CAMINO 
20 CHEVROLET 8 NOVA (-79) 
20 CHEVROLET 9 CAMARO 
20 CHEVROLET 10 MONTE CARLO ('70-'88) (RWD ONLY) 
20 CHEVROLET 11 VEGA 
20 CHEVROLET 12 MONZA 
20 CHEVROLET 13 CHEVETTE 
20 CHEVROLET 15 CITATION 
20 CHEVROLET 16 CAVALIER 
20 CHEVROLET 17 CELEBRITY 
20 CHEVROLET 19 BERETTA/CORSICA 
20 CHEVROLET 20 LUMINA 
20 CHEVROLET 31 SPECTRUM 
20 CHEVROLET 32 NOVA/GEO PRIZM 
20 CHEVROLET 33 SPRINT/GEO SPRINT 
20 CHEVROLET 34 GEO METRO 
20 CHEVROLET 35 GEO STORM 
20 CHEVROLET 36 MONTE CARLO (1995+) (FWD ONLY) 
20 CHEVROLET 37 MALIBU (1997+) 
20 CHEVROLET 38 SSR 
20 CHEVROLET 39 AVEO 
20 CHEVROLET 398 OTHER AUTOMOBILE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 211 


Variable Definitions and Codes - GeneralVehicle Data Set 

20 CHEVROLET 399 UNKNOWN AUTOMOBILE 

20 CHEVROLET 401 S-10 BLAZER, BLAZER 

20 CHEVROLET 402 GEO TRACKER 

20 CHEVROLET 403 TRAILBLAZER (2002 and later) 

20 CHEVROLET 404 EQUINOX 

20 CHEVROLET 421 FULLSIZE BLAZER (K, Tahoe) 

20 CHEVROLET 431 SUBURBAN 

20 CHEVROLET 441 ASTRO VAN 

20 CHEVROLET 442 LUMINA APV/VENTURE 

20 CHEVROLET 461 G-SERIES VAN 

20 CHEVROLET 466 P-SERIES VAN 

20 CHEVROLET 470 VAN DERIVATIVE 

20 CHEVROLET 471 S-10/T-10 

20 CHEVROLET 472 LUV 

20 CHEVROLET 473 COLORADO 

20 CHEVROLET 481 C, K, R, V-SERIES PICKUP 

20 CHEVROLET 482 AVALANCHE 

20 CHEVROLET 498 OTHER LIGHT TRUCK 

20 CHEVROLET 499 UNKNOWN LIGHT TRUCK 

20 CHEVROLET 881 MEDIUM/HEAVY CBE 

20 CHEVROLET 882 MEDIUM/HEAVY COE LOW ENTRY 

20 CHEVROLET 883 MEDIUM/HEAVY COE HIGH ENTRY 

20 CHEVROLET 884 MEDIUM/HEAVY; UNKNOWN ENGINE 
LOCATION 

20 CHEVROLET 890 MEDIUM/HEAVY; UNKNOWN ENGINE 

LOCAITON 

20 CHEVROLET 898 OTHER MEDIUM/HEAVY TRUCK 

20 CHEVROLET 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

20 CHEVROLET 899 UNKNOWN MEDIUM/HEAVY TRUCK 

20 CHEVROLET 981 BUS 

20 CHEVROLET 988 OTHER BUS 

20 CHEVROLET 989 UNKNOWN BUS TYPE 

20 CHEVROLET 998 OTHER VEHICLE 

20 CHEVROLET 999 UNKNOWN VEHICLE 

21 OLDSMOBILE 1 CUTLASS (RWD-ONLY) 

21 OLDSMOBILE 2 DELTA 88 

21 OLDSMOBILE 3 NINETY-EIGHT 

21 OLDSMOBILE 5 TORONADO-TROFEO 

21 OLDSMOBILE 6 COMMERCIAL SERIES 

21 OLDSMOBILE 12 STARFIRE 

21 OLDSMOBILE 15 OMEGA 

21 OLDSMOBILE 16 FIRENZA 

21 OLDSMOBILE 17 CIERA 

21 OLDSMOBILE 18 CALAIS 

21 OLDSMOBILE 20 CUTLASS (FWD) 

21 OLDSMOBILE 21 ACHIEVA 

21 OLDSMOBILE 22 AURORA 

21 OLDSMOBILE 23 INTRIGUE 

21 OLDSMOBILE 24 ALERO 

21 OLDSMOBILE 398 OTHER AUTOMOBILE 

21 OLDSMOBILE 399 UNKNOWN AUTOMOBILE 

21 OLDSMOBILE 401 BRAVADA 

21 OLDSMOBILE 441 SILHOUETTE 

21 OLDSMOBILE 498 OTHER LIGHT TRUCK 

21 OLDSMOBILE 499 UNKNOWN LIGHT TRUCK 

21 OLDSMOBILE 998 OTHER VEHICLE 

21 OLDSMOBILE 999 UNKNOWN VEHICLE 

22 PONTIAC 1 LEMANS/TEMPEST (THRU 79) 

22 PONTIAC 2 BONNEVILLE/CATALINA/PARISIENNE 

22 PONTIAC 5 FIERO 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 212 


Variable Definitions and Codes - GeneralVehicle Data Set 

22 PONTIAC 8 VENTURA 

22 PONTIAC 9 FIREBIRD/TRANS AM 

22 PONTIAC 10 GRAND PRIX (RWD) 

22 PONTIAC 11 ASTRE 

22 PONTIAC 12 SUNBIRD (THRU 80) 

22 PONTIAC 13 T1000/1000 

22 PONTIAC 15 PHOENIX 

22 PONTIAC 16 J2000/SUNBIRD/SUNFIRE 

22 PONTIAC 17 6000 

22 PONTIAC 18 GRAND AM 

22 PONTIAC 20 GRAND PRIX (FWD) 

22 PONTIAC 31 LEMANS (88-on) 

22 PONTIAC 398 OTHER AUTOMOBILE 

22 PONTIAC 399 UNKNOWN AUTOMOBILE 

22 PONTIAC 401 AZTEK 

22 PONTIAC 402 VIBE 

22 PONTIAC 441 TRANS SPORT/MONTANA 

22 PONTIAC 498 OTHER LIGHT TRUCK 

22 PONTIAC 499 UNKNOWN LIGHT TRUCK 

22 PONTIAC 999 UNKNOWN VEHICLE 

22 PONTIAC OTHER LIGHT 

23 GMC 7 CABALLERO/SPRINT 

23 GMC 398 OTHER AUTOMOBILE 

23 GMC 399 UNKNOWN AUTOMOBILE 

23 GMC 401 JIMMY/TYPHOON/ENVOY 

23 GMC 421 FULLSIZE JIMMY/YUKON 

23 GMC 431 SUBURBAN 

23 GMC 441 SAFARI (MINIVAN) 

23 GMC 461 G-SERIES VAN 

23 GMC 466 P-SERIES VAN 

23 GMC 470 VAN DERIVATIVE 

23 GMC 471 S15/T15/SONOMA 

23 GMC 472 CANYON 

23 GMC 481 C, K, R, V-SERIES PICKUP 

23 GMC 498 OTHER LIGHT TRUCK 

23 GMC 499 UNKNOWN LIGHT TRUCK 

23 GMC 881 MEDIUM/HEAVY CBE 

23 GMC 882 MEDIUM/HDAVY COE LOW ENTRY 

23 GMC 883 MEDIUM/HEAVY COE HIGH ENTRY 

23 GMC 884 MEDIUM/HEAVY: UNKNOWN ENGINE 
LOCATION 

23 GMC 890 MEDIUM/HEAVY: COE ENTRY POSITION 

UNKNOWN 

23 GMC 898 OTHER MEDIUM/HEAVY TRUCK 

23 GMC 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

23 GMC 899 UNKNOWN MEDIUM/HEAVY TRUCK 

23 GMC 981 MEDIUM BUS 

23 GMC 988 OTHER BUS 

23 GMC 989 UNKNOWN BUS TYPE 

23 GMC 999 UNKNOWN VEHICLE 

24 SATURN 1 SL 

24 SATURN 2 SC 

24 SATURN 3 SW 

24 SATURN 4 EV 

24 SATURN 5 LS/ LS1/ LS2/L100/L200/L300 

24 SATURN 6 LW/LW1/ LW2/ LW200/300 

24 SATURN 7 ION 

24 SATURN 398 OTHER AUTOMOBILE 

24 SATURN 399 UNKNOWN AUTOMOBILE 

24 SATURN 401 VUE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 213 


Variable Definitions and Codes - GeneralVehicle Data Set 

24 SATURN 498 OTHER LIGHT TRUCK 
24 SATURN 499 UNKNOWN LIGHT TRUCK 
24 SATURN 999 UNKNOWN VEHICLE 
25 GRUMMAN 441 LLV 
25 GRUMMAN 442 STEP-IN VAN 
25 GRUMMAN 498 OTHER LIGHT TRUCK 
25 GRUMMAN 499 UNKNOWN LIGHT TRUCK 
25 GRUMMAN 881 MEDIUM/HEAVY TRUCK - CBE 
25 GRUMMAN 882 MEDIUM/HEAVY TRUCK - COE LOW ENTRY 
25 GRUMMAN 883 MEDIUM/HEAVY TRUCK - COE HIGH ENTRY 
25 GRUMMAN 884 MEDIUM/HEAVY TRUCK UNKNOWN ENGINE 

LOCATION 
25 GRUMMAN 890 MEDIUM/HEAVY TRUCK ENTRY POSITION 

UNKNOWN 
25 GRUMMAN 898 OTHER MEDIUM/HEAVY TRUCK 
25 GRUMMAN 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 
25 GRUMMAN 899 UNKNOWN MEDIUM/HEAVY TRUCK 
25 GRUMMAN 983 BUS-FLAT FRONT, REAR ENGINE 
25 GRUMMAN 988 OTHER BUS 
25 GRUMMAN 989 UNKNOWN BUS TYPE 
25 GRUMMAN 999 UNKNOWN VEHICLE 
29 STUDEBAKER 1 LARK 
29 STUDEBAKER 1 GRAN TURISMO 
29 STUDEBAKER 1 CRUISER 
29 STUDEBAKER 1 HAWK 
29 STUDEBAKER 1 OTHER AUTOMOBILE 
29 AVANTI 1 OTHER AUTOMOBILE 
29 AVANTI 1 UNKNOWN AUTOMOBILE 
29 STUDEBAKER 1 UNKNOWN AUTOMOBILE 
29 CHECKER 2 MARATHON 
29 CHECKER 2 TAXI 
29 CHECKER 2 AEROBUS 
29 CHECKER 2 SUPERBA 
29 CHECKER 2 UNKNOWN AUTOMOBILE 
29 CHECKER 2 OTHER AUTOMOBILE 
29 EXCALIBER 398 OTHER AUTOMOBILE 
29 CONSULIER 398 OTHER AUTOMOBILE 
29 CONSULIER 398 UNKNOWN AUTOMOBILE 
29 OTHER DOMESTIC 

 MANUFACTURER (light vehicles) 398 OTHER MAKE 
29 EXCALIBER 398 UNKNOWN AUTOMOBILE 
29 HUDSON 398 UNKNOWN AUTOMOBILE 
29 DESOTO 398 UNKNOWN AUTOMOBILE 
29 STUTZ 398 OTHER AUTOMOBILE 
29 HUDSON 398 OTHER AUTOMOBILE 
29 STUTZ 398 UNKNOWN AUTOMOBILE 
29 DESOTO 398 OTHER AUTOMOBILE 
29 OTHER DOMESTIC 

MANUFACTURER (light vehicles) 399 UNKNOWN MAKE 
29 

OTHER DOMESTIC 

MANUFACTURER (light vehicles) 498 OTHER LIGHT TRUCK 
29 INDIAN 701 MOTORCYCLE (000-050CC) 
29 BUELL 701 MOTORCYCLE (000-051CC) 
29 INDIAN 702 MOTORCYCLE (051-124CC) 
29 BUELL 702 MOTORCYCLE (051-124CC) 
29 INDIAN 703 MOTORCYCLE (125-349CC) 
29 BUELL 703 MOTORCYCLE (125-349CC) 
29 INDIAN 704 MOTORCYCLE (350-449CC) 
29 BUELL 704 MOTORCYCLE (350-449CC) 
29 INDIAN 705 MOTORCYCLE (450-749CC) 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 214 


Variable Definitions and Codes - GeneralVehicle Data Set 

29 BUELL 705 MOTORCYCLE (450-749CC) 

29 INDIAN 706 MOTORCYCLE (750CC OR GREATER) 

29 BUELL 706 MOTORCYCLE (750CC OR GREATER) 

29 INDIAN 709 MOTORCYCLE (UNKNOWN CC) 

29 BUELL 709 MOTORCYCLE (UNKNOWN CC) 

29 INDIAN 798 OTHER MOTORED CYCLE 

29 BUELL 798 OTHER MOTORED CYCLE 

29 INDIAN 799 UNKNOWN MOTORED CYCLE 

29 BUELL 799 UNKNOWN MOTORED CYCLE 

29 OTHER DOMESTIC 
MANUFACTURER (light vehicles) 898 OTHER MEDIUM/HEAVY TRUCK 

29 

OTHER DOMESTIC 
MANUFACTURER (light vehicles) 988 OTHER BUS 


29 OTHER DOMESTIC 
MANUFACTURER (light vehicles) 998 OTHER VEHICLE 

30 VOLKSWAGEN 31 KARMANN GHIA 

30 VOLKSWAGEN 32 BEETLE 1300/1500 

30 VOLKSWAGEN 33 SUPER BEETLE 

30 VOLKSWAGEN 34 411/412 

30 VOLKSWAGEN 35 SQUAREBACK/FASTBACK 

30 VOLKSWAGEN 36 RABBIT 

30 VOLKSWAGEN 37 DASHER 

30 VOLKSWAGEN 38 SCIROCCO 

30 VOLKSWAGEN 40 JETTA 

30 VOLKSWAGEN 41 QUANTUM 

30 VOLKSWAGEN 42 GOLF/CABRIOLET/GTI 

30 VOLKSWAGEN 43 RABBIT PICKUP 

30 VOLKSWAGEN 44 FOX 

30 VOLKSWAGEN 45 CORRADO 

30 VOLKSWAGEN 46 PASSAT 

30 VOLKSWAGEN 47 JETTA III 

30 VOLKSWAGEN 48 GOLF III 

30 VOLKSWAGEN 49 NEW BEETLE 

30 VOLKSWAGEN 50 PHAETON 

30 VOLKSWAGEN 398 OTHER AUTOMOBILE 

30 VOLKSWAGEN 399 UNKNOWN AUTOMOBILE 

30 VOLKSWAGEN 401 THE THING (181) 

30 VOLKSWAGEN 421 TOUAREG 

30 VOLKSWAGEN 441 VANAGON/CAMPER 

30 VOLKSWAGEN 442 EUROVAN 

30 VOLKSWAGEN 498 OTHER LIGHT TRUCK 

30 VOLKSWAGEN 499 UNKNOWN LIGHT TRUCK 

30 VOLKSWAGEN 998 OTHER VEHICLE 

30 VOLKSWAGEN 999 UNKNOWN VEHICLE 

31 ALFA ROMEO 31 SPIDER 

31 ALFA ROMEO 32 SPORTS SEDAN 

31 ALFA ROMEO 33 SPRINT SPECIAL 

31 ALFA ROMEO 34 GTV-6 

31 ALFA ROMEO 35 164 

31 ALFA ROMEO 398 OTHER AUTOMOBILE 

31 ALFA ROMEO 399 UNKNOWN AUTOMOBILE 

31 ALFA ROMEO 999 UNKNOWN VEHICLE 

32 AUDI 31 SUPER 90 

32 AUDI 32 100/A6 

32 AUDI 33 FOX 

32 AUDI 34 4000 

32 AUDI 35 5000 

32 AUDI 36 80/90 

32 AUDI 37 200 

32 AUDI 38 V8 QUATTRO 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 215 


Variable Definitions and Codes - GeneralVehicle Data Set 

32 AUDI 39 COUPE QUATTRO 
32 AUDI 40 S4/S6 
32 AUDI 41 CABRIOLET 
32 AUDI 42 A4 
32 AUDI 43 A3 
32 AUDI 44 A8 
32 AUDI 45 TT 
32 AUDI 46 S8 
32 AUDI 47 ALLROAD 
32 AUDI 398 OTHER AUTOMOBILE 
32 AUDI 399 UNKNOWN AUTOMOBILE 
32 AUDI 999 UNKNOWN VEHICLE 
33 AUSTIN / AUSTIN HEALEY 31 MARINA 
33 AUSTIN / AUSTIN HEALEY 32 AMERICA 
33 AUSTIN / AUSTIN HEALEY 33 HEALEY SPRITE 
33 AUSTIN / AUSTIN HEALEY 34 HEALY 3000 
33 AUSTIN / AUSTIN HEALEY 35 MINI 
33 AUSTIN / AUSTIN HEALEY 398 OTHER AUTOMOBILE 
33 AUSTIN / AUSTIN HEALEY 399 UNKNOWN AUTOMOBILE 
33 AUSTIN / AUSTIN HEALEY 999 UNKNOWN VEHICLE 
34 BMW 31 1600, 2002 
34 BMW 32 COUPE 
34 BMW 33 BAVARIA SEDAN 
34 BMW 34 3 SERIES 
34 BMW 35 5 SERIES 
34 BMW 36 6 SERIES 
34 BMW 37 7 SERIES 
34 BMW 38 8 SERIES 
34 BMW 39 Z3 
34 BMW 40 Z8 
34 BMW 42 Z4 
34 BMW 398 OTHER AUTOMOBILE 
34 BMW 399 UNKNOWN AUTOMOBILE 
34 BMW 401 X5 
34 BMW 402 X3 
34 BMW 498 OTHER LIGHT TRUCK 
34 BMW 499 UNKNOWN LIGHT TRUCK 
34 BMW 701 MOTORCYCLE (000-050CC) 
34 BMW 702 MOTORCYCLE (051-124CC) 
34 BMW 703 MOTORCYCLE (125-349CC) 
34 BMW 704 MOTORCYCLE (350-449CC) 
34 BMW 705 MOTORCYCLE (450-749CC) 
34 BMW 706 MOTORCYCLE (750CC-OVER) 
34 BMW 709 MOTORCYCLE (UNKNOWN CC) 
34 BMW 799 UNKNOWN MOTORED CYCLE 
34 BMW 999 UNKNOWN VEHICLE 
35 NISSAN / DATSUN 31 F10 
35 NISSAN / DATSUN 32 200/240 SX 
35 NISSAN / DATSUN 33 1200/210/B210 
35 NISSAN / DATSUN 34 Z-CAR, ZX 
35 NISSAN / DATSUN 35 310 
35 NISSAN / DATSUN 36 510 
35 NISSAN / DATSUN 37 610 
35 NISSAN / DATSUN 38 710 
35 NISSAN / DATSUN 39 810/MAXIMA 
35 NISSAN / DATSUN 40 ROADSTER 
35 NISSAN / DATSUN 41 PL411, RL411 
35 NISSAN / DATSUN 42 STANZA 
35 NISSAN / DATSUN 43 SENTRA 
35 NISSAN / DATSUN 44 PULSAR 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 216 


Variable Definitions and Codes - GeneralVehicle Data Set 

35 NISSAN / DATSUN 45 MICRA 

35 NISSAN / DATSUN 46 NX 1600/2000 

35 NISSAN / DATSUN 47 ALTIMA 

35 NISSAN / DATSUN 48 350Z 

35 NISSAN / DATSUN 49 MURANO 

35 NISSAN / DATSUN 398 OTHER AUTOMOBILE 

35 NISSAN / DATSUN 399 UNKNOWN AUTOMOBILE 

35 NISSAN / DATSUN 401 PATHFINDER 

35 NISSAN / DATSUN 402 XTERRA 

35 NISSAN / DATSUN 421 PATHFINDER ARMADA 

35 NISSAN / DATSUN 441 VAN 

35 NISSAN / DATSUN 442 AXXESS 

35 NISSAN / DATSUN 443 QUEST 

35 NISSAN / DATSUN 471 DATSUN/NISSAN PU/FRONTIER 

35 NISSAN / DATSUN 473 TITAN 

35 NISSAN / DATSUN 498 OTHER LIGHT TRUCK 

35 NISSAN / DATSUN 499 UNKNOWN LIGHT TRUCK 

35 NISSAN / DATSUN 883 MEDIUM/HEAVY COE HIGH ENTRY 

35 NISSAN / DATSUN 898 OTHER MEDIUM/HEAVY TRUCK 

35 NISSAN / DATSUN 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

35 NISSAN / DATSUN 899 UNKNOWN MEDIUM/HEAVY TRUCK 

35 NISSAN / DATSUN 999 UNKNOWN VEHICLE 

36 FIAT 31 124 (COUPE/SEDAN) 

36 FIAT 32 124 SPIDER/RACER 

36 FIAT 33 BRAVA - 131 

36 FIAT 34 850 (COUPE/SPYDER) 

36 FIAT 35 128 

36 FIAT 36 X-1/9 

36 FIAT 37 STRADA 

36 FIAT 398 OTHER AUTOMOBILE 

36 FIAT 399 UNKNOWN AUTOMOBILE 

36 FIAT 882 MEDIUM/HEAVY COE LOW ENTRY 

36 FIAT 883 MEDIUM/HEAVY COE HIGH ENTRY 

36 FIAT 890 MEDIUM/HEAVY COE ENTRY POSITION 
UNKNOWN 

36 FIAT 898 OTHER MEDIUM/HEAVY TRUCK 

36 FIAT 899 UNKNOWN MEDIUM/HEAVY TRUCK 

36 FIAT 999 UNKNOWN VEHICLE 

37 HONDA 31 CIVIC/CRX/DEL SOL 

37 HONDA 32 ACCORD 

37 HONDA 33 PRELUDE 

37 HONDA 34 600 

37 HONDA 35 S2000 

37 HONDA 37 INSIGHT 

37 HONDA 38 FCX 

37 HONDA 398 OTHER AUTOMOBILE 

37 HONDA 399 UNKNOWN AUTOMOBILE 

37 HONDA 401 PASSPORT 

37 HONDA 402 CR-V 

37 HONDA 403 ELEMENT 

37 HONDA 421 PILOT 

37 HONDA 441 ODYSSEY 

37 HONDA 498 OTHER LIGHT TRUCK 

37 HONDA 499 UNKNOWN LIGHT TRUCK 

37 HONDA 701 MOTORCYCLE (000-050CC) 

37 HONDA 702 MOTORCYCLE (051-124CC) 

37 HONDA 703 MOTORCYCLE (125-349CC) 

37 HONDA 704 MOTORCYCLE (350-449CC) 

37 HONDA 705 MOTORCYCLE (450-749CC) 

37 HONDA 706 MOTORCYCLE (750CC-OVER) 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 217 


Variable Definitions and Codes - GeneralVehicle Data Set 

37 HONDA 709 MOTORCYCLE (UNKNOWN CC) 

37 HONDA 731 ATC/ATV (000-050CC) 

37 HONDA 732 ATC/ATV (051-124CC) 

37 HONDA 733 ATC/ATV (125-349CC) 

37 HONDA 734 ATC/ATV (350CC-OVER) 

37 HONDA 739 ATC/ATV (UNKNOWN CC) 

37 HONDA 798 OTHER MOTORED CYCLE 

37 HONDA 999 UNKNOWN VEHICLE 

38 ISUZU 31 I-MARK 

38 ISUZU 32 IMPULSE 

38 ISUZU 33 STYLUS 

38 ISUZU 398 OTHER AUTOMOBILE 

38 ISUZU 399 UNKNOWN AUTOMOBILE 

38 ISUZU 401 TROOPER/TROOPER II 

38 ISUZU 402 RODEO 

38 ISUZU 403 AMIGO 

38 ISUZU 404 VEHICROSS 

38 ISUZU 405 AXIOM 

38 ISUZU 421 ASCENDER 

38 ISUZU 441 OASIS 

38 ISUZU 471 P'UP (PICKUP) HOMBRE 

38 ISUZU 498 OTHER LIGHT TRUCK 

38 ISUZU 499 UNKNOWN LIGHT TRUCK 

38 ISUZU 881 MEDIUM/HEAVY - CBE 

38 ISUZU 882 MEDIUM/HEAVY COE LOW ENTRY 

38 ISUZU 883 MEDIUM/HEAVY COE HIGH ENTRY 

38 ISUZU 884 MEDIUM/HEAVY UNKNOWN ENGINE 
LOCATION 

38 ISUZU 890 MEDIUM/HEAVY COE ENTRY POSITION 

UNKNOWN 

38 ISUZU 898 OTHER MEDIUM/HEAVY TRUCK 

38 ISUZU 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 

38 ISUZU 899 UNKNOWN MEDIUM/HEAVY TRUCK 

38 ISUZU 981 CONVENTIONAL FRONT ENGINE 

38 ISUZU 982 FRONT ENGINE/FLAT FRONT 

38 ISUZU 983 REAR ENGINE/FLAT FRONT 

38 ISUZU 988 OTHER BUS 

38 ISUZU 989 UNKNOWN BUS TYPE 

38 ISUZU 999 UNKNOWN VEHICLE 

39 JAGUAR 31 XJ-S COUPE 

39 JAGUAR 32 VANDEN PLAS 

39 JAGUAR 32 XJ6/12 SEDAN/COUPE/XJ8/ 

39 JAGUAR 33 XKE 

39 JAGUAR 34 S-TYPE 

39 JAGUAR 34 X100 

39 JAGUAR 35 X-TYPE 

39 JAGUAR 398 OTHER AUTOMOBILE 

39 JAGUAR 399 UNKNOWN AUTOMOBILE 

39 JAGUAR 999 UNKNOWN VEHICLE 

40 LANCIA 31 BETA SEDAN-HPE 

40 LANCIA 32 BETA COUPE - ZAGATO 

40 LANCIA 33 SCORPION 

40 LANCIA 398 OTHER AUTOMOBILE 

40 LANCIA 399 UNKNOWN AUTOMOBILE 

40 LANCIA 999 UNKNOWN VEHICLE 

41 MAZDA 31 RX2 

41 MAZDA 32 RX3 

41 MAZDA 33 RX4 

41 MAZDA 34 RX7 

41 MAZDA 35 GLC/PROTEGE/323 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 218 


Variable Definitions and Codes - GeneralVehicle Data Set 

41 MAZDA 36 COSMO 

41 MAZDA 37 626 

41 MAZDA 38 808 

41 MAZDA 39 MIZER 

41 MAZDA 40 R-100 

41 MAZDA 41 616/618 

41 MAZDA 42 1800 

41 MAZDA 43 929 

41 MAZDA 44 MX-6 

41 MAZDA 45 MIATA 

41 MAZDA 46 MX-3 

41 MAZDA 47 MILLENIA 

41 MAZDA 48 MP3 

41 MAZDA 49 RX-8 

41 MAZDA 50 MAZDA 6 

41 MAZDA 51 MAZDA3 

41 MAZDA 398 OTHER AUTOMOBILE 

41 MAZDA 399 UNKNOWN AUTOMOBILE 

41 MAZDA 401 NAVAJO 

41 MAZDA 402 TRIBUTE 

41 MAZDA 441 MPV 

41 MAZDA 471 MAZDA PICKUP 

41 MAZDA 498 OTHER LIGHT TRUCK 

41 MAZDA 499 UNKNOWN LIGHT TRUCK 

41 MAZDA 999 UNKNOWN VEHICLE 

42 MERCEDES BENZ 31 200/220/230/240/250/260/280/300/320 
SE,CD,D,SD,ETC 

42 MERCEDES BENZ 32 230/280 SL 

42 MERCEDES BENZ 33 300/350/380/450/500SL/560SL 

42 MERCEDES BENZ 34 350/380/420/450/560/ SLC 

42 MERCEDES BENZ 35 280/300SEL 

42 MERCEDES BENZ 36 380/420/450/500/560SEL/500SEC/ 

560SEC/350SDL/300SDL 

42 MERCEDES BENZ 37 300 SE/380/450 SE 

42 MERCEDES BENZ 38 600, 6.9 SEDAB 

42 MERCEDES BENZ 39 190 

42 MERCEDES BENZ 40 300 

42 MERCEDES BENZ 41 400/500 E 

42 MERCEDES BENZ 42 220/280 C 

42 MERCEDES BENZ 43 S CLASS 

42 MERCEDES BENZ 44 SL CLASS 

42 MERCEDES BENZ 45 SLK 

42 MERCEDES BENZ 46 CL 

42 MERCEDES BENZ 47 CLK 

42 MERCEDES BENZ 48 E 

42 MERCEDES BENZ 398 OTHER AUTOMOBILE 

42 MERCEDES BENZ 399 UNKNOWN AUTOMOBILE 

42 MERCEDES BENZ 401 M 

42 MERCEDES BENZ 402 G CLASS 

42 MERCEDES BENZ 470 VAN DERIVATIVE 

42 MERCEDES BENZ 498 OTHER LIGHT TRUCK 

42 MERCEDES BENZ 499 UNKNOWN LIGHT TRUCK 

42 MERCEDES BENZ 881 MEDIUM/HEAVE - CBE 

42 MERCEDES BENZ 882 MEDIUM/HEAVY - COE LOW ENTRY 

42 MERCEDES BENZ 883 MEDIUM/HEAVY - COE HIGH ENTRY 

42 MERCEDES BENZ 884 MEDIUM/HEAVY; UNKNOWN ENGINE 
LOCATION 

42 MERCEDES BENZ 890 MEDIUM/HEAVY: COE ENTRY POSITION 
UNKNOWN 

42 MERCEDES BENZ 898 OTHER MEDIUM/HEAVY TRUCK 

42 MERCEDES BENZ 899 UNKNOWN MEDIUM/HEAVY TRUCK 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 219 


Variable Definitions and Codes - GeneralVehicle Data Set 

42 MERCEDES BENZ 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 
42 MERCEDES BENZ 981 MEDIUM BUS 
42 MERCEDES BENZ 988 OTHER BUS 
42 MERCEDES BENZ 989 UNKNOWN BUS TYPE 
42 MERCEDES BENZ 999 UNKNOWN VEHICLE 
43 MG 31 MIDGET 
43 MG 32 MGB ('76-'79) 
43 MG 33 MGB ('67-'75) 
43 MG 34 MGA 
43 MG 35 TA/TC/TD/TF 
43 MG 36 MGC 
43 MG 398 OTHER AUTOMOBILE 
43 MG 399 UNKNOWN AUTOMOBILE 
43 MG 999 UNKNOWN VEHICLE 
44 PEUGEOT 31 304 
44 PEUGEOT 32 403 
44 PEUGEOT 33 404 
44 PEUGEOT 34 504/505 
44 PEUGEOT 35 604 
44 PEUGEOT 36 405 
44 PEUGEOT 398 OTHER AUTOMOBILE 
44 PEUGEOT 399 UNKNOWN AUTOMOBILE 
44 PEUGEOT 701 MOTORCYCLE (000-050CC) 
44 PEUGEOT 702 MOTORCYCLE (051-124CC) 
44 PEUGEOT 709 MOTORCYCLE (UNKNOWN CC) 
44 PEUGEOT 799 UNKNOWN MOTORED CYCLE 
44 PEUGEOT 999 UNKNOWN VEHICLE 
45 PORSCHE 31 911 
45 PORSCHE 32 912 
45 PORSCHE 33 914 
45 PORSCHE 34 924 
45 PORSCHE 35 928 
45 PORSCHE 36 930 
45 PORSCHE 37 944 
45 PORSCHE 38 959 
45 PORSCHE 39 968 
45 PORSCHE 40 986 BOXSTER 
45 PORSCHE 398 OTHER AUTOMOBILE 
45 PORSCHE 399 UNKNOWN AUTOMOBILE 
45 PORSCHE 421 CAYENNE 
45 PORSCHE 999 UNKNOWN VEHICLE 
46 RENAULT/AMC 31 LECAR 
46 RENAULT/AMC 32 DAUPHINE/10/R-8/CARAVELLE 
46 RENAULT/AMC 33 12 
46 RENAULT/AMC 34 15 
46 RENAULT/AMC 35 16 
46 RENAULT/AMC 36 17 
46 RENAULT/AMC 37 R18I 
46 RENAULT/AMC 38 FUEGO 
46 RENAULT/AMC 39 ALLIANCE/ENCORE/GTA, CONVERTIBLE 
46 RENAULT/AMC 41 ALPINE 
46 RENAULT/AMC 44 MEDALLION 
46 RENAULT/AMC 45 PREMIER 
46 RENAULT/AMC 398 OTHER AUTOMOBILE 
46 RENAULT/AMC 399 UNKNOWN AUTOMOBILE 
46 RENAULT/AMC 999 UNKNOWN VEHICLE 
47 SAAB 31 99/99E/900 
47 SAAB 32 SONNETT 
47 SAAB 33 95/96/97 
47 SAAB 34 9000, CS 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 220 


Variable Definitions and Codes - GeneralVehicle Data Set 

47 SAAB 35 9 - 3 
47 SAAB 36 9 - 5 
47 SAAB 398 OTHER AUTOMOBILE 
47 SAAB 399 UNKNOWN AUTOMOBILE 
47 SAAB 999 UNKNOWN VEHICLE 
48 SUBARU 31 DL/FE/G/GF/GL/GLF/STD/LOYALE 
48 SUBARU 32 STAR 
48 SUBARU 33 360 
48 SUBARU 34 LEGACY 
48 SUBARU 35 XT/XT6 
48 SUBARU 36 JUSTY 
48 SUBARU 37 SVX 
48 SUBARU 38 IMPREZA 
48 SUBARU 43 BRAT DL, GL 
48 SUBARU 44 BAJA 
48 SUBARU 45 OUTBACK 
48 SUBARU 398 OTHER AUTOMOBILE 
48 SUBARU 399 UNKNOWN AUTOMOBILE 
48 SUBARU 401 FORESTER 
48 SUBARU 498 OTHER LIGHT TRUCK 
48 SUBARU 499 UNKNOWN LIGHT TRUCK 
48 SUBARU 999 UNKNOWN VEHICLE 
49 TOYOTA 31 CORONA 
49 TOYOTA 32 COROLLA 
49 TOYOTA 33 CELICA 
49 TOYOTA 34 SUPRA 
49 TOYOTA 35 CRESSIDA 
49 TOYOTA 36 CROWN 
49 TOYOTA 37 CARINA 
49 TOYOTA 38 TERCEL 
49 TOYOTA 39 STARLET 
49 TOYOTA 40 CAMRY 
49 TOYOTA 41 MR-2 
49 TOYOTA 42 PASEO 
49 TOYOTA 43 AVALON 
49 TOYOTA 44 SOLARA 
49 TOYOTA 45 ECHO 
49 TOYOTA 46 PRIUS 
49 TOYOTA 48 SCION XA 
49 TOYOTA 49 SCION XB 
49 TOYOTA 398 OTHER AUTOMOBILE 
49 TOYOTA 399 UNKNOWN AUTOMOBILE 
49 TOYOTA 401 4-RUNNER 
49 TOYOTA 402 RAV-4 
49 TOYOTA 403 HIGHLANDER 
49 TOYOTA 403 HIGHLANDER 
49 TOYOTA 404 MATRIX 
49 TOYOTA 421 LANDCRUISER 
49 TOYOTA 422 SEQUOIA 
49 TOYOTA 441 MINVAN/PREVIA 
49 TOYOTA 442 SIENNA 
49 TOYOTA 471 PICKUP 
49 TOYOTA 472 TACOMA 
49 TOYOTA 481 T-100 
49 TOYOTA 482 TUNDRA 
49 TOYOTA 498 OTHER LIGHT TRUCK 
49 TOYOTA 499 UNKNOWN LIGHT TRUCK 
49 TOYOTA 999 UNKNOWN VEHICLE 
50 TRIUMPH 31 SPITFIRE 
50 TRIUMPH 32 GT-6 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 221 


Variable Definitions and Codes - GeneralVehicle Data Set 

50 TRIUMPH 33 TR4 

50 TRIUMPH 34 TR6 

50 TRIUMPH 35 TR7/8 

50 TRIUMPH 36 HERALD 

50 TRIUMPH 37 STAG 

50 TRIUMPH 398 OTHER AUTOMOBILE 

50 TRIUMPH 399 UNKNOWN AUTOMOBILE 

50 TRIUMPH 701 MOTORCYCLE (000-050CC) 

50 TRIUMPH 702 MOTORCYCLE (051-124CC) 

50 TRIUMPH 703 MOTORCYCLE (125-349CC) 

50 TRIUMPH 704 MOTORCYCLE (350-449CC) 

50 TRIUMPH 705 MOTORCYCLE (450-749CC) 

50 TRIUMPH 706 MOTORCYCLE (750CC-OVER) 

50 TRIUMPH 709 MOTORCYCLE (UNKNOWN CC) 

50 TRIUMPH 799 UNKNOWN MOTORED CYCLE 

50 TRIUMPH 999 UNKNOWN VEHICLE 

51 VOLVO 31 122 

51 VOLVO 32 142/144/145 

51 VOLVO 33 164 

51 VOLVO 34 240/242/244/245 

51 VOLVO 35 262/264/265 

51 VOLVO 36 1800 

51 VOLVO 38 760/780 

51 VOLVO 39 740 

51 VOLVO 40 940 

51 VOLVO 41 960 

51 VOLVO 42 850 

51 VOLVO 43 70 SERIES 

51 VOLVO 44 90 SERIES 

51 VOLVO 45 80 SERIES 

51 VOLVO 46 4O SERIES 

51 VOLVO 47 60 SERIES 

51 VOLVO 398 OTHER AUTOMOBILE 

51 VOLVO 399 UNKNOWN AUTOMOBILE 

51 VOLVO 401 XC90 

51 VOLVO 881 MEDIUM/HEAVY CBE 

51 VOLVO 882 MEDIUM/HEAVY COE LOW ENTRY 

51 VOLVO 883 MEDIUM/HEAVY COE HIGH ENTRY 

51 VOLVO 884 MEDIUM/HEAVY - UNKNOWN ENGINE 
LOCATION 

51 VOLVO 890 MEDIUM/HEAVY: COE ENTRY POSITION 

UNKNOWN 

51 VOLVO 898 OTHER MEDIUM/HEAVY TRUCK 

51 VOLVO 899 UNKNOWN MEDIUM/HEAVY TRUCK 

51 VOLVO 981 MEDIUM BUS 

51 VOLVO 988 OTHER BUS 

51 VOLVO 989 UNKNOWN TYPE BUS 

51 VOLVO 999 UNKNOWN VEHICLE 

52 MITSUBISHI 31 STARION 

52 MITSUBISHI 32 TREDIA 

52 MITSUBISHI 33 CORDIA 

52 MITSUBISHI 34 GALANT 

52 MITSUBISHI 35 MIRAGE 

52 MITSUBISHI 36 PRECIS 

52 MITSUBISHI 37 ECLIPSE 

52 MITSUBISHI 38 SIGMA 

52 MITSUBISHI 39 3000GT 

52 MITSUBISHI 40 DIAMANTE 

52 MITSUBISHI 46 LANCER 

52 MITSUBISHI 398 OTHER AUTOMOBILE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 222 


Variable Definitions and Codes - GeneralVehicle Data Set 

52 MITSUBISHI 399 UNKNOWN AUTOMOBILE 
52 MITSUBISHI 401 MONTERO 
52 MITSUBISHI 402 OUTLANDER 
52 MITSUBISHI 403 ENDEAVOR 
52 MITSUBISHI 441 MINIVAN 
52 MITSUBISHI 442 EXPO WAGON 
52 MITSUBISHI 471 PICKUP 
52 MITSUBISHI 498 OTHER LIGHT TRUCK 
52 MITSUBISHI 499 UNKNOWN LIGHT TRUCK 
52 MITSUBISHI 882 MEDIUM/HEAVY - COE LOW ENTRY 
52 MITSUBISHI 898 OTHER MEDIUM/HEAVY TRUCK 
52 MITSUBISHI 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 
52 MITSUBISHI 899 UNKNOWN MEDIUM/HEAVY TRUCK 
52 MITSUBISHI 981 CONVENTIONAL FRONT ENGINE 
52 MITSUBISHI 982 FRONT ENGINE/FLAT FRONT 
52 MITSUBISHI 983 REAR ENGINE/FLAT FRONT 
52 MITSUBISHI 988 OTHER BUS 
52 MITSUBISHI 989 UNKNOWN TYPE BUS 
52 MITSUBISHI 999 UNKNOWN VEHICLE 
53 SUZUKI 31 SA310 
53 SUZUKI 34 SWIFT 
53 SUZUKI 35 ESTEEM 
53 SUZUKI 36 AERIO 
53 SUZUKI 37 FORENZA 
53 SUZUKI 38 VERONA 
53 SUZUKI 398 OTHER AUTOMOBILE 
53 SUZUKI 399 UNKNOWN AUTOMOBILE 
53 SUZUKI 401 SAMURAI 
53 SUZUKI 402 SIDEKICK/GRAND VITARA 
53 SUZUKI 403 X-90/VITARA 
53 SUZUKI 404 GRAND VITARA 
53 SUZUKI 405 XL7 
53 SUZUKI 498 OTHER LIGHT TRUCK 
53 SUZUKI 499 UNKNOWN LIGHT TRUCK 
53 SUZUKI 701 MOTORCYCLE (000-050CC) 
53 SUZUKI 702 MOTORCYCLE (051-124CC) 
53 SUZUKI 703 MOTORCYCLE (125-349CC) 
53 SUZUKI 704 MOTORCYCLE (350-449CC) 
53 SUZUKI 705 MOTORCYCLE (450-749CC) 
53 SUZUKI 706 MOTORCYCLE (750CC-OVER) 
53 SUZUKI 709 MOTORCYCLE (UNKNOWN CC) 
53 SUZUKI 731 ATC/ATV (000-050CC) 
53 SUZUKI 732 ATC/ATV (051-124CC) 
53 SUZUKI 733 ATC/ATV (125-349CC) 
53 SUZUKI 734 ATC/ATV (350CC-OVER) 
53 SUZUKI 739 ATC/ATV (UNKNOWN CC) 
53 SUZUKI 799 UNKNOWN MOTORED CYCLE 
53 SUZUKI 999 UNKNOWN VEHICLE 
54 ACURA 31 INTEGRA 
54 ACURA 32 LEGEND 
54 ACURA 32 RL 
54 ACURA 33 NSX 
54 ACURA 34 VIGOR 
54 ACURA 35 TL 
54 ACURA 35 CL 
54 ACURA 38 RSX 
54 ACURA 39 TSX 
54 ACURA 398 OTHER AUTOMOBILE 
54 ACURA 399 UNKNOWN AUTOMOBILE 
54 ACURA 401 SLX 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 223 


Variable Definitions and Codes - GeneralVehicle Data Set 

54 ACURA 421 MDX 
54 ACURA 498 OTHER LIGHT TRUCK 
54 ACURA 499 UNKNOWN TYPE LIGHT TRUCK 
54 ACURA 999 UNKNOWN VEHICLE 
55 HYUNDAI 31 PONY 
55 HYUNDAI 32 EXCEL 
55 HYUNDAI 33 SONATA 
55 HYUNDAI 34 SCOUPE 
55 HYUNDAI 35 ELANTRA 
55 HYUNDAI 36 ACCENT 
55 HYUNDAI 37 TIBURON 
55 HYUNDAI 38 XG300/350 
55 HYUNDAI 398 OTHER AUTOMOBILE 
55 HYUNDAI 399 UNKNOWN AUTOMOBILE 
55 HYUNDAI 401 SANTA FE 
55 HYUNDAI 498 OTHER LIGHT TRUCK 
55 HYUNDAI 499 UNKNOWN LIGHT TRUCK 
55 HYUNDAI 999 UNKNOWN VEHICLE 
56 MERKUR 31 XR4Ti 
56 MERKUR 32 SCORPIO 
56 MERKUR 398 OTHER AUTOMOBILE 
56 MERKUR 399 UNKNOWN AUTOMOBILE 
56 MERKUR 999 UNKNOWN VEHICLE 
57 YUGO 31 GV 
57 YUGO 398 OTHER AUTOMOBILE 
57 YUGO 399 UNKNOWN AUTOMOBILE 
57 YUGO 999 UNKNOWN VEHICLE 
58 INFINITI 31 M30 
58 INFINITI 32 Q45 
58 INFINITI 33 G20 
58 INFINITI 34 J30 
58 INFINITI 35 I30 
58 INFINITI 36 I35 
58 INFINITI 37 G35 
58 INFINITI 38 M45 
58 INFINITI 39 FX35/45 
58 INFINITI 398 OTHER AUTOMOBILE 
58 INFINITI 399 UNKNOWN AUTOMOBILE 
58 INFINITI 401 QX4 
58 INFINITI 421 QX56 
58 INFINITI 498 OTHER LIGHT TRUCK 
58 INFINITI 499 UNKNOWN LIGHT TRUCK 
58 INFINITI 999 UNKNOWN VEHICLE 
59 LEXUS 31 ES250/ES-300 
59 LEXUS 32 LS400 
59 LEXUS 33 SC-300/SC-400 
59 LEXUS 34 GS300/GS400 
59 LEXUS 35 IS-300 
59 LEXUS 36 SC 430 
59 LEXUS 398 OTHER AUTOMOBILE 
59 LEXUS 399 UNKNOWN AUTOMOBILE 
59 LEXUS 401 RX300 
59 LEXUS 402 GX470 
59 LEXUS 421 LX 450/470 
59 LEXUS 498 OTHER LIGHT TRUCK 
59 LEXUS 499 UNKNOWN LIGHT TRUCK 
59 LEXUS 999 UNKNOWN VEHICLE 
60 DAIHATSU 31 CHARADE 
60 DAIHATSU 398 OTHER AUTOMOBILE 
60 DAIHATSU 399 UNKNOWN AUTOMOBILE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 224 


Variable Definitions and Codes - GeneralVehicle Data Set 

60 DAIHATSU 401 ROCKY 
60 DAIHATSU 498 OTHER LIGHT TRUCK 
60 DAIHATSU 499 UNKNOWN LIGHT TRUCK 
60 DAIHATSU 999 UNKNOWN VEHICLE 
61 STERLING 31 827S 
61 STERLING 398 OTHER AUTOMOBILE 
61 STERLING 399 UNKNOWN AUTOMOBILE 
61 STERLING 999 UNKNOWN VEHICLE 
62 LAND ROVER 401 DISCOVERY (LR) 
62 LAND ROVER 421 COUNTY LWB (RR) / COUNT CLASSIC (RR) 
62 LAND ROVER 422 FREELANDER 
62 LAND ROVER 422 4.0 SE (RR) 
62 LAND ROVER 422 DEFENDER 90 (LR) 
62 LAND ROVER 498 OTHER LIGHT TRUCK 
62 LAND ROVER 499 UNKNOWN LIGHT TRUCK 
62 LAND ROVER 999 UNKNOWN VEHICLE 
63 KIA 31 SEPHIA 
63 KIA 32 SPECTRA 
63 KIA 33 RIO 
63 KIA 34 OPTIMA 
63 KIA 35 AMANTI 
63 KIA 398 OTHER AUTOMOBILE 
63 KIA 399 UNKNOWN AUTOMOBILE 
63 KIA 401 SPORTAGE 
63 KIA 402 SORRENTO 
63 KIA 441 SEDONA 
63 KIA 498 OTHER LIGHT TRUCK 
63 KIA 499 UNKNOWN LIGHT TRUCK 
63 KIA 999 UNKNOWN VEHICLE 
64 DAEWOO 31 LANOS 
64 DAEWOO 32 NUBIRA 
64 DAEWOO 33 LEGANZA 
64 DAEWOO 398 OTHER AUTOMOBILE 
64 DAEWOO 399 UNKNOWN AUTOMOBILE 
64 DAEWOO 999 UNKNOWN VEHICLE 
65 MINI 31 COOPER,COOPER S 
69 ASTON MARTIN 31 LAGONDA 
69 ASTON MARTIN 31 OTHER AUTOMOBILE 
69 ASTON MARTIN 31 UNKNOWN AUTOMOBILE 
69 ASTON MARTIN 31 VOLANTE 
69 ASTON MARTIN 31 SALOON 
69 ASTON MARTIN 31 VANTAGE 
69 BRICKLIN 32 OTHER AUTOMOBILE 
69 BRICKLIN 32 UNKNOWN AUTOMOBILE 
69 CITROEN 33 UNKNOWN AUTOMOBILE 
69 CITROEN 33 OTHER AUTOMOBILE 
69 DELOREAN 34 OTHER AUTOMOBILE 
69 DELOREAN 34 UNKNOWN AUTOMOBILE 
69 FERRARI 35 OTHER AUTOMOBILE 
69 FERRARI 35 UNKNOWN AUTOMOBILE 
69 HILLMAN 36 OTHER AUTOMOBILE 
69 HILLMAN 36 UNKNOWN AUTOMOBILE 
69 JENSEN 37 HEALY 
69 JENSEN 37 UNKNOWN AUTOMOBILE 
69 JENSEN 37 OTHER AUTOMOBILE 
69 LAMBORGHINI 38 UNKNOWN AUTOMOBILE 
69 LAMBORGHINI 38 JALPA 
69 LAMBORGHINI 38 OTHER AUTOMOBILE 
69 LAMBORGHINI 38 COUNTACH 5000S 
69 LOTUS 39 EUROPE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 225 


Variable Definitions and Codes - GeneralVehicle Data Set 

69 LOTUS 39 ESPRIT 
69 LOTUS 39 UNKNOWN AUTOMOBILE 
69 LOTUS 39 OTHER AUTOMOBILE 
69 MASERATI 40 BITURBO 
69 MASERATI 40 OTHER AUTOMOBILE 
69 MASERATI 40 UNKNOWN AUTOMOBILE 
69 MORRIS 41 MINOR 
69 MORRIS 41 UNKNOWN AUTOMOBILE 
69 MORRIS 41 OTHER AUTOMOBILE 
69 ROLLS ROYCE/BENTLEY 42 CLOUD/SHADOW SERIES 
69 ROLLS ROYCE/BENTLEY 42 UNKNOWN AUTOMOBILE 
69 ROLLS ROYCE/BENTLEY 42 OTHER AUTOMOBILE 
69 SIMCA 44 UNKNOWN AUTOMOBILE 
69 SIMCA 44 OTHER AUTOMOBILE 
69 SUNBEAM 45 OTHER AUTOMOBILE 
69 SUNBEAM 45 UNKNOWN AUTOMOBILE 
69 TVR 46 OTHER AUTOMOBILE 
69 TVR 46 UNKNOWN AUTOMOBILE 
69 DESTA 48 OTHER AUTOMOBILE 
69 DESTA 48 UNKNOWN AUTOMOBILE 
69 RELIANT 49 OTHER AUTOMOBILE 
69 RELIANT 49 UNKNOWN AUTOMOBILE 
69 BERTONE 52 OTHER AUTOMOBILE 
69 BERTONE 52 UNKNOWN AUTOMOBILE 
69 LADA 53 OTHER AUTOMOBILE 
69 LADA 53 UNKNOWN AUTOMOBILE 
69 OTHER FOREIGN 

 MANUFACTURER (light vehicles) 398 OTHER MAKE 
69 OTHER FOREIGN 
MANUFACTURER (light vehicles) 399 UNKOWN MAKE 
69 OTHER FOREIGN 
MANUFACTURER (light vehicles) 498 OTHER LIGHT TRUCK 
69 OTHER FOREIGN 
MANUFACTURER (light vehicles) 898 OTHER MEDIUM/HEAVY TRUCK 
69 OTHER FOREIGN 
MANUFACTURER (light vehicles) 988 OTHER BUS 
69 OTHER FOREIGN 

MANUFACTURER (light vehicles) 998 OTHER VEHICLE 
70 BSA 701 MOTORCYCLE (000-050CC) 
70 BSA 702 MOTORCYCLE (051-124CC) 
70 BSA 703 MOTORCYCLE (125-349CC) 
70 BSA 704 MOTORCYCLE (350-449CC) 
70 BSA 705 MOTORCYCLE (450-749CC) 
70 BSA 706 MOTORCYCLE (750CC-OVER) 
70 BSA 709 MOTORCYCLE (UNKNOWN CC) 
70 BSA 798 OTHER MOTORED CYCLE 
70 BSA 799 UNKNOWN MOTORED CYCLE 
71 DUCATI 701 MOTORCYCLE (000-050CC) 
71 DUCATI 702 MOTORCYCLE (051-124CC) 
71 DUCATI 703 MOTORCYCLE (125-349CC) 
71 DUCATI 704 MOTORCYCLE (350-449CC) 
71 DUCATI 705 MOTORCYCLE (450-749CC) 
71 DUCATI 706 MOTORCYCLE (750CC-OVER) 
71 DUCATI 709 MOTORCYCLE (UNKNOWN CC) 
71 DUCATI 798 OTHER MOTORED CYCLE 
71 DUCATI 799 UNKNOWN MOTORED CYCLE 
72 HARLEY-DAVIDSON 701 MOTORCYCLE (000-050CC) 
72 HARLEY-DAVIDSON 702 MOTORCYCLE (051-124CC) 
72 HARLEY-DAVIDSON 703 MOTORCYCLE (125-349CC) 
72 HARLEY-DAVIDSON 704 MOTORCYCLE (350-449CC) 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 226 


Variable Definitions and Codes - GeneralVehicle Data Set 

72 HARLEY-DAVIDSON 705 MOTORCYCLE (450-749CC) 
72 HARLEY-DAVIDSON 706 MOTORCYCLE (750CC-OVER) 
72 HARLEY-DAVIDSON 709 MOTORCYCLE (UNKNOWN CC) 
72 HARLEY-DAVIDSON 798 OTHER MOTORED CYCLE 
72 HARLEY-DAVIDSON 799 UNKNOWN MOTORED CYCLE 
73 KAWASAKI 701 MOTORCYCLE (000-050CC) 
73 KAWASAKI 702 MOTORCYCLE (051-124CC) 
73 KAWASAKI 703 MOTORCYCLE (125-349CC) 
73 KAWASAKI 704 MOTORCYCLE (350-449CC) 
73 KAWASAKI 705 MOTORCYCLE (450-749CC) 
73 KAWASAKI 706 MOTORCYCLE (750CC-OVER) 
73 KAWASAKI 709 MOTORCYCLE (UNKNOWN CC) 
73 KAWASAKI 731 ATC/ATV (000-050CC) 
73 KAWASAKI 732 ATC/ATV (051-124CC) 
73 KAWASAKI 733 ATC/ATV (125-349CC) 
73 KAWASAKI 734 ATC/ATV (350CC-OVER) 
73 KAWASAKI 739 ATC/ATV (UNKNOWN CC) 
73 KAWASAKI 798 OTHER MOTORED CYCLE 
73 KAWASAKI 799 UNKNOWN MOTORED CYCLE 
74 MOTO-GUZZI 701 MOTORCYCLE (000-050CC) 
74 MOTO-GUZZI 702 MOTORCYCLE (051-124CC) 
74 MOTO-GUZZI 703 MOTORCYCLE (125-349CC) 
74 MOTO-GUZZI 704 MOTORCYCLE (350-449CC) 
74 MOTO-GUZZI 705 MOTORCYCLE (450-749CC) 
74 MOTO-GUZZI 706 MOTORCYCLE (750CC-OVER) 
74 MOTO-GUZZI 709 MOTORCYCLE (UNKNOWN CC) 
74 MOTO-GUZZI 731 ATC/ATV (000-050CC) 
74 MOTO-GUZZI 732 ATC/ATV (051-124CC) 
74 MOTO-GUZZI 733 ATC/ATV (125-349CC) 
74 MOTO-GUZZI 734 ATC/ATV (350CC-OVER) 
74 MOTO-GUZZI 739 ATC/ATV (UNKNOWN CC) 
74 MOTO-GUZZI 798 OTHER MOTORED CYCLE 
74 MOTO-GUZZI 799 UNKNOWN MOTORED CYCLE 
75 NORTON 701 MOTORCYCLE (000-050CC) 
75 NORTON 702 MOTORCYCLE (051-124CC) 
75 NORTON 703 MOTORCYCLE (125-349CC) 
75 NORTON 704 MOTORCYCLE (350-449CC) 
75 NORTON 705 MOTORCYCLE (450-749CC) 
75 NORTON 706 MOTORCYCLE (750CC-OVER) 
75 NORTON 709 MOTORCYCLE (UNKNOWN CC) 
75 NORTON 798 OTHER MOTORED CYCLE 
75 NORTON 799 UNKNOWN MOTORED CYCLE 
76 YAMAHA 701 MOTORCYCLE (000-050CC) 
76 YAMAHA 702 MOTORCYCLE (051-124CC) 
76 YAMAHA 703 MOTORCYCLE (125-349CC) 
76 YAMAHA 704 MOTORCYCLE (350-449CC) 
76 YAMAHA 705 MOTORCYCLE (450-749CC) 
76 YAMAHA 706 MOTORCYCLE (750CC-OVER) 
76 YAMAHA 709 MOTORCYCLE (UNKNOWN CC) 
76 YAMAHA 731 ATC/ATV (000-050CC) 
76 YAMAHA 732 ATC/ATV (051-124CC) 
76 YAMAHA 733 ATC/ATV (125-349CC) 
76 YAMAHA 734 ATC/ATV (350CC-OVER) 
76 YAMAHA 739 ATC/ATV (UNKNOWN CC) 
76 YAMAHA 798 OTHER MOTORED CYCLE 
76 YAMAHA 799 UNKNOWN MOTORED CYCLE 
76 YAMAHA 998 OTHER VEHICLE 
78 OTHER MAKE MOPED 701 0-50cc 
78 OTHER MAKE MOPED 702 51-124cc 
78 OTHER MAKE MOPED 709 UNKNOWN cc 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 227 


Variable Definitions and Codes - GeneralVehicle Data Set 

78 OTHER MAKE MOPED 798 OTHER MOTORED CYCLE 
78 OTHER MAKE MOPED 799 UNKNOWN MOTORED CYCLE 
79 OTHER MAKE MOTORED CYCLE 701 0-50cc 
79 OTHER MAKE MOTORED CYCLE 702 51-124cc 
79 OTHER MAKE MOTORED CYCLE 703 125-349cc 
79 OTHER MAKE MOTORED CYCLE 704 350-449cc 
79 OTHER MAKE MOTORED CYCLE 705 450-749cc 
79 OTHER MAKE MOTORED CYCLE 706 750c or greater 
79 OTHER MAKE MOTORED CYCLE 709 Unknown cc 
79 OTHER MAKE MOTORED CYCLE 731 ATC/ATV 0-50cc 
79 OTHER MAKE MOTORED CYCLE 732 ATC/ATV 51-124cc 
79 OTHER MAKE MOTORED CYCLE 733 ATC/ATV 125-349cc 
79 OTHER MAKE MOTORED CYCLE 734 ATC/ATV 350cc OR GREATER 
79 OTHER MAKE MOTORED CYCLE 739 ATV/ATC UNKNOWN cc 
79 OTHER MAKE MOTORED CYCLE 798 OTHER MOTORED CYCLE 
79 OTHER MAKE MOTORED CYCLE 799 UNKNOWN MOTORED CYCLE 
80 BROCKWAY 850 MEDIUM/HEAVY TRUCK BASED 

MOTORHOME 
80 BROCKWAY 881 MEDIUM/HEAVY - CBE 
80 BROCKWAY 882 MEDIUM/HEAVE - COE/LOW ENTRY 
80 BROCKWAY 883 MEDIUM/HEAVY - COE HIGH ENTRY 
80 BROCKWAY 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
80 BROCKWAY 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
80 BROCKWAY 898 MEDIUM/HEAVY - OTHER 
80 BROCKWAY 899 UNKNOWN MEDIUM/HEAVY TRUCK 
81 DIAMOND REO/REO 850 MEDIUM/HEAVY TRUCK BASED 

MOTORHOME 
81 DIAMOND REO/REO 881 MEDIUM/HEAVY - CBE 
81 DIAMOND REO/REO 882 MEDIUM/HEAVY - COE/LOW ENTRY 
81 DIAMOND REO/REO 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
81 DIAMOND REO/REO 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
81 DIAMOND REO/REO 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
81 DIAMOND REO/REO 898 MEDIUM/HEAVY - OTHER 
81 DIAMOND REO/REO 899 UNKNOWN MEDIUM/HEAVY TRUCK 
82 FREIGHTLINER/WHITE 461 SPRINTER/ADVANTAGE 
82 FREIGHTLINER/WHITE 470 M-LINE WALK IN VAN 
82 FREIGHTLINER/WHITE 498 OTHER LIGHT TRUCK 
82 FREIGHTLINER/WHITE 499 UNKNOWN LIGHT TRUCK 
82 FREIGHTLINER/WHITE 850 MEDIUM/HEAVY TRUCK BASED 

MOTORHOME 
82 FREIGHTLINER/WHITE 881 MEDIUM/HEAVY - CBE 
82 FREIGHTLINER/WHITE 882 MEDIUM/HEAVY - COE/LOW ENTRY 
82 FREIGHTLINER/WHITE 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
82 FREIGHTLINER/WHITE 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
82 FREIGHTLINER/WHITE 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
82 FREIGHTLINER/WHITE 898 MEDIUM/HEAVY - OTHER 
82 FREIGHTLINER/WHITE 899 UNKNOWN LIGHT/MEDIUM/HEAVY TRUCK 
82 FREIGHTLINER/WHITE 981 BUS CONVENTIONAL ENGINE OUT FRONT 
82 FREIGHTLINER/WHITE 982 BUS FRONT ENGINE/FLAT FRONT 
82 FREIGHTLINER/WHITE 983 BUS REAR ENGINE/FLAT FRONT 
82 FREIGHTLINER/WHITE 988 OTHER BUS 
82 FREIGHTLINER/WHITE 989 UNKNOWN BUS TYPE 
82 FREIGHTLINER/WHITE 999 UNKNOWN VEHICLE 
83 FWD 850 MEIDUM/HEAVY TRUCK BASED 

MOTORHOME 
83 FWD 881 MEDIUM/HEAVY - CBE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 228 


Variable Definitions and Codes - GeneralVehicle Data Set 

83 FWD 882 MEDIUM/HEAVY - COE/LOW ENTRY 
83 FWD 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
83 FWD 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
83 FWD 898 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
83 FWD 898 MEDIUM/HEAVY - OTHER 
83 FWD 899 UNKNOWN MEDIUM/HEAVY TRUCK 
84 INTERNATIONAL HARVESTER/NAVISTAR 421 SCOUT 
84 INTERNATIONAL HARVESTER/NAVISTAR 431 TRAVELALL 
84 INTERNATIONAL HARVESTER/NAVISTAR 466 MULTISTOP VAN 
84 INTERNATIONAL HARVESTER/NAVISTAR 481 PICKUP 
84 INTERNATIONAL HARVESTER/NAVISTAR 498 OTHER LIGHT TRUCK 
84 INTERNATIONAL HARVESTER/NAVISTAR 499 UNKNOWN LIGHT TRUCK 
84 INTERNATIONAL HARVESTER/NAVISTAR 850 TRUCK BASED MOTORHOME 
84 INTERNATIONAL HARVESTER/NAVISTAR 881 MEDIUM HEAVY - CBE 
84 INTERNATIONAL HARVESTER/NAVISTAR 882 MEDIUM/HEAVY - COE LOW ENTRY 
84 INTERNATIONAL HARVESTER/NAVISTAR 883 MEDIUM/HEAVY - COE HIGH ENTRY 
84 INTERNATIONAL HARVESTER/NAVISTAR 884 MEDIUM/HEAVY: UNKNOWN ENGINE 

LOCATION 
84 INTERNATIONAL HARVESTER/NAVISTAR 890 MEDIUM/HEAVY: COE ENTRY POSITION 

UNKNOWN 
84 INTERNATIONAL HARVESTER/NAVISTAR 898 OTHER MEDIUM/HEAVY TRUCK 
84 INTERNATIONAL HARVESTER/NAVISTAR 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 
84 INTERNATIONAL HARVESTER/NAVISTAR 899 UNKNOWN MEDIUM/HEAVY TRUCK 
84 INTERNATIONAL HARVESTER/NAVISTAR 950 BUS BASED MOTOHOME 
84 INTERNATIONAL HARVESTER/NAVISTAR 981 CONVENTIONAL BUS 
84 INTERNATIONAL HARVESTER/NAVISTAR 982 BUS-FLAT FRONT, FRONT ENGINE 
84 INTERNATIONAL HARVESTER/NAVISTAR 983 BUS-FLAT FRONT, REAR ENGINE 
84 INTERNATIONAL HARVESTER/NAVISTAR 988 OTHER BUS 
84 INTERNATIONAL HARVESTER/NAVISTAR 989 UNKNOWN BUS TYPE 
84 INTERNATIONAL HARVESTER/NAVISTAR 998 OTHER VEHICLE 
84 INTERNATIONAL HARVESTER/NAVISTAR 999 UNKNOWN VEHICLE 
85 KENWORTH 850 MEDIUM/HEAVY TRUCK BASED 

MOTORHOME 
85 KENWORTH 881 MEDIUM/HEAVY - CBE 
85 KENWORTH 882 MEDIUM/HEAVY - COE/LOW ENTRY 
85 KENWORTH 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
85 KENWORTH 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
85 KENWORTH 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
85 KENWORTH 898 MEDIUM/HEAVY - OTHER 
85 KENWORTH 899 UNKNOWN MEDIUM/HEAVY TRUCK 
86 MACK 850 MEDIUM/HEAVY BASED MOTORHOME 
86 MACK 881 MEDIUM/HEAVY - CBE 
86 MACK 882 MEDIUM/HEAVY - COE/LOW ENTRY 
86 MACK 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
86 MACK 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
86 MACK 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
86 MACK 898 MEDIUM/HEAVY - OTHER 
86 MACK 899 UNKNOWN MEDIUM/HEAVY TRUCK 
87 PETERBILT 850 MEDIUM/HEAVY BASED MOTORHOME 
87 PETERBILT 881 MEDIUM/HEAVY - CBE 
87 PETERBILT 882 MEDIUM/HEAVY - COE/LOW ENTRY 
87 PETERBILT 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
87 PETERBILT 884 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
87 PETERBILT 890 MEDIUM/HEAVY - COE/ENTRY POSITION 
UNKNOWN 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 229 


Variable Definitions and Codes - GeneralVehicle Data Set 

87 PETERBILT 898 MEDIUM/HEAVY - OTHER 
87 PETERBILT 899 UNKNOWN MEDIUM/HEAVY TRUCK 
88 IVECO/MAGIRUS 850 MEDIUM/HEAVY BASED MOTORHOME 
88 IVECO/MAGIRUS 881 MEDIUM/HEAVY - CBE 
88 IVECO/MAGIRUS 882 MEDIUM/HEAVY - COE/LOW ENTRY 
88 IVECO/MAGIRUS 883 MEDIUM/HEAVY - COE/HIGH ENTRY 
88 IVECO/MAGIRUS 884 MEDIUM/HEAVY - UNKOWN ENGINE 

LOCATION 
88 IVECO/MAGIRUS 890 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
88 IVECO/MAGIRUS 898 MEDIUM/HEAVY - OTHER 
88 IVECO/MAGIRUS 899 UNKNOWN MEDIUM/HEAVY TRUCK 
98 OTHER MAKE (med/heavy truck/bus or "other") 398 OTHER AUTOMOBILE 
98 WINNEBAGO 470 VAN BASED MOTORHOME 
98 OTHER MAKE (med/heavy truck/bus or "other") 498 OTHER LIGHT TRUCK 
98 WINNEBAGO 498 LIGHT TRUCK BASED MOTORHOME 
98 WINNEBAGO 499 UNKNOWN TYPE LIGHT MOTORHOME 
98 AUTOCAR 801 MEDIUM/HEAVY BASED MOTORHOME 
98 AUTOCAR 801 MEDIUM/HEAVY - CBE 
98 AUTOCAR 801 MEDIUM/HEAVY - COE/HIGH ENTRY 
98 AUTOCAR 801 MEDIUM/HEAVY - COE/LOW ENTRY 
98 AUTOCAR 801 MEDIUM/HEAVY - UNKOWN ENGINE 

LOCATION 
98 AUTOCAR 801 MEDIUM/HEAVY - OTHER 
98 AUTOCAR 801 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY BASED MOTORHOME 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - COE/HIGH ENTRY 
98 AUTOCAR 802 MEDIUM/HEAVY - COE/LOW ENTRY 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - CBE 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - COE/LOW ENTRY 
98 AUTO-UNION-DKW 802 MEDIUM/HEAVY - OTHER 
98 DIVCO 803 MEDIUM/HEAVY BASED MOTORHOME 
98 DIVCO 803 MEDIUM/HEAVY - COE/LOW ENTRY 
98 DIVCO 803 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
98 DIVCO 803 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
98 DIVCO 803 MEDIUM/HEAVY - COE/HIGH ENTRY 
98 DIVCO 803 MEDIUM/HEAVY - CBE 
98 DIVCO 803 MEDIUM/HEAVY - OTHER 
98 WESTERN STAR 804 MEDIUM/HEAVY BASED MOTORHOME 
98 WESTERN STAR 804 MEDIUM/HEAVY - CBE 
98 WESTERN STAR 804 MEDIUM/HEAVY - COE/HIGH ENTRY 
98 WESTERN STAR 804 MEDIUM/HEAVY - OTHER 
98 WESTERN STAR 804 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
98 WESTERN STAR 804 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
98 WESTERN STAR 804 MEDIUM/HEAVY - COE/LOW ENTRY 
98 OSHKOSH 805 MEDIUM/HEAVY BASED MOTORHOME 
98 OSHKOSH 805 MEDIUM/HEAVY - OTHER 
98 OSHKOSH 805 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 
98 OSHKOSH 805 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 
98 OSHKOSH 805 MEDIUM/HEAVY - COE/HIGH ENTRY 
98 OSHKOSH 805 MEDIUM/HEAVY - COE/LOW ENTRY 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 230 


Variable Definitions and Codes - GeneralVehicle Data Set 

98 OSHKOSH 805 MEDIUM/HEAVY - CBE 

98 HINO 806 MEDIUM/HEAVY BASED MOTORHOME 

98 HINO 806 MEDIUM/HEAVY - CBE 

98 HINO 806 MEDIUM/HEAVY - OTHER 

98 HINO 806 MEDIUM/HEAVY - COE/ENTRY POSITION 
UNKNOWN 

98 HINO 806 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 

98 HINO 806 MEDIUM/HEAVY - COE/HIGH ENTRY 

98 HINO 806 MEDIUM/HEAVY - COE/LOW ENTRY 

98 SCANIA 807 MEDIUM/HEAVY BASED MOTORHOME 

98 SCANIA 807 MEDIUM/HEAVY - CBE 

98 SCANIA 807 MEDIUM/HEAVY - COE/LOW ENTRY 

98 SCANIA 807 MEDIUM/HEAVY - OTHER 

98 SCANIA 807 MEDIUM/HEAVY - COE/ENTRY POSITION 
UNKNOWN 

98 SCANIA 807 MEDIUM/HEAVY - UNKNOWN ENGINE 
LOCATION 

98 SCANIA 807 MEDIUM/HEAVY - COE/HIGH ENTRY 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - CBE 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - OTHER 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - COE/HIGH ENTRY 

98 STERLING TRUCKS 808 MEDIUM/HEAVY - COE/LOW ENTRY 

98 OTHER MAKE (med/heavy truck/bus or "other") 850 TRUCK BASED MOTORHOME 

98 WINNEBAGO 850 MOTOR HOME 

98 MARMON 898 MEDIUM/HEAVY - OTHER 

98 MARMON 898 MEDIUM/HEAVY - COE/ENTRY POSITION 

UNKNOWN 

98 MARMON 898 MEDIUM/HEAVY - CBE 

98 MARMON 898 MEDIUM/HEAVY - COE/HIGH ENTRY 

98 WINNEBAGO 898 MEDIUM / HEAVY OTHER 

98 OTHER MAKE (med/heavy truck/bus or "other") 898 OTHER MEDIUM/HEAVY TRUCK 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - OTHER 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - COE/ENTRY POSITION 
UNKNOWN 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - UNKNOWN ENGINE 
LOCATION 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - COE/HIGH ENTRY 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - COE/LOW ENTRY 

98 WARD LAFRANCE 898 MEDIUM/HEAVY - CBE 

98 WARD LAFRANCE 898 MEDIUM/HEAVY BASED MOTORHOME 

98 MARMON 898 MEDIUM/HEAVY - UNKNOWN ENGINE 

LOCATION 

98 MARMON 898 MEDIUM/HEAVY - COE/LOW ENTRY 

98 MARMON 898 MEDIUM/HEAVY BASED MOTORHOME 

98 WINNEBAGO 899 MEDIUM / HEAVY UNKNOWN 

98 NEOPLAN 902 BUS - CONVENTIONAL FRONT ENGINE 

98 NEOPLAN 902 BUS BASED MOTORHOME 

98 NEOPLAN 902 BUS - FRONT ENGINE/FLAT FRONT 

98 NEOPLAN 902 BUS - REAR ENGINE/FLAT FRONT 

98 NEOPLAN 902 OTHER BUS 

98 OTHER MAKE (med/heavy truck/bus or "other") 950 BUS BASED MOTORHOME 

98 OTHER MAKE (med/heavy truck/bus or "other") 988 OTHER BUS 

98 OTHER MAKE (med/heavy truck/bus or "other") 998 OTHER VEHICLE 

98 WINNEBAGO 999 UNKNOWN VEHICLE 

99 UNKNOWN MANUFACTURER 399 UNKNOWN AUTOMOBILE 

99 UNKNOWN FOREIGN MANUFACTURER 399 UNKNOWN AUTOMOBILE 

99 UNKNOWN DOMESTIC MANUFACTURER 399 UNKNOWN AUTOMOBILE 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 231 


Variable Definitions and Codes - GeneralVehicle Data Set 

99 UNKNOWN MANUFACTURER 499 UNKNOWN LIGHT TRUCK 
99 UNKNOWN DOMESTIC MANUFACTURER 499 UNKNOWN LIGHT TRUCK 
99 UNKNOWN FOREIGN MANUFACTURER 499 UNKNOWN LIGHT TRUCK 
99 UNKNOWN FOREIGN MANUFACTURER 799 UNKNOWN MOTORED CYCLE 
99 UNKNOWN DOMESTIC MANUFACTURER 799 UNKNOWN MOTORED CYCLE 
99 UNKNOWN MANUFACTURER 799 UNKNOWN MOTORED CYCLE 
99 UNKNOWN MEDIUM/HEAVY TRUCKS AND 

BUSES MANUFACTURER 899 Unknown medium/heavy truck 
99 UNKNOWN FOREIGN MANUFACTURER 899 UNKNOWN MEDIUM/HEAVY TRUCK 
99 UNKNOWN MANUFACTURER 899 UNK TYPE TRUCK (LIGHT/MED/HEAVY) 
99 UNKNOWN DOMESTIC MANUFACTURER 899 UNKNOWN MEDIUM/HEAVY TRUCK 
99 UNKNOWN MANUFACTURER 899 UNKNOWN MEDIUM/HEAVY TRUCK 
99 UNKNOWN MEDIUM/HEAVY TRUCKS AND 

BUSES MANUFACTURER 988 Unknown bus type 
99 UNKNOWN MANUFACTURER 989 UNKNOWN BUS TYPE 
99 UNKNOWN FOREIGN MANUFACTURER 989 UNKNOWN BUS TYPE 
99 UNKNOWN DOMESTIC MANUFACTURER 989 UNKNOWN BUS TYPE 
99 UNKNOWN MANUFACTURER 999 UNKNOWN VEHICLE 
99 UNKNOWN DOMESTIC MANUFACTURER 999 UNKNOWN VEHICLE 
99 UNKNOWN FOREIGN MANUFACTURER 999 UNKNOWN VEHICLE 

Vehicle Model Year 

Definition: This variable establishes the model year that the vehicle was manufactured. 

Source: Primary source is the VIN during vehicle inspection; secondary sources include the 
police report and interviews. 

Cross Reference: Identical to Overview.OVEYear. Congruent with GeneralVehicle.VINYear, 
values will differ due to VIN vs. Researcher determined values. Related to 
TruckUnits.ManufactureDate if TruckUnit.TUNPosition = 1 when applicable. 

Variable Name: GVEYear 

Attribute Codes 
Code* 
9999 
Meaning 
Actual model year 
Unknown 
Body Type 

Definition: This variable identifies the body type for this vehicle. 

Source: Vehicle inspection, police report, and interview. 

Cross Reference: Congruent with GeneralVehicle.VINBodyType, values will differ due to VIN 
vs. Researcher determined values. Identical to VehicleExterior.VEXBodyType when applicable. 
Elaborates on TruckExterior.PowerUnitType when applicable. 

Variable Name: GVEBodyType 
Attribute Codes 
Code Meaning 

1 Convertible 
2 2-door sedan, hardtop, coupe 
3 3-door/2-door hatchback 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 232 


Variable Definitions and Codes - GeneralVehicle Data Set 

4 4-door sedan, hardtop 
5 5-door/4-door hatchback 
6 Station Wagon 
7 Hatchback, number of doors unknown 
8 Other automobile type 
9 Unknown automobile type 
10 Auto based pickup 
11 Auto based panel 
12 Large limousine 
13 Three-wheel automobile or automobile derivative 
14 Compact utility 
15 Large utility 
16 Utility station wagon 
17 3-door coupe 
19 Utility, unknown body type 
20 Minivan 
21 Large van 
22 Step van or walk-in van 
23 Van based motor home 
24 Van based school bus 
25 Van based other bus 
28 Other van type 
29 Unknown van type 
30 Compact pickup 
31 Large pickup 
32 Pickup with slide-in camper 
33 Convertible pickup 
39 Unknown pickup style light conventional truck type 
40 Cab chassis based 
41 Truck based panel 
42 Light truck based motor home (chassis mounted) 
45 Other light conventional truck type 
48 Unknown light truck type 
49 Unknown light vehicle type 
50 School bus 
58 Other bus type 
59 Unknown bus type 
60 Step van 
61 Single unit straight truck(4500kg<GVWR<=8850kg) 
62 Single unit straight truck(8850kg<GVWR<=12000kg) 
63 Single unit straight truck (GVWR > 12,000kg) 
64 Single unit straight truck (GVWR unknown) 
65 Medium/heavy truck based motor home 
66 Truck-tractor (Cab Only, or any trailing units) 
67 Truck-tractor with no cargo trailer 
68 Truck-tractor pulling one trailer 
69 Truck-tractor pulling two or more trailers 
70 Truck-tractor (unknown if pulling trailer) 
74 Medium/heavy Pickup (>=4,536kg) 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 233 


Variable Definitions and Codes - GeneralVehicle Data Set 

78 Unknown medium/heavy truck type 
79 Unknown truck type (light/medium/heavy) 
80 Motorcycle 
81 Moped 
82 Three-wheel motorcycle or moped 
88 Other motored cycle (mini-bike, motor scooter) 
89 Unknown motored cycle type 
90 ATV (All-Terrain Vehicle) & ATC (All-Terrain Cycle) 
91 Snowmobile 
92 Farm equipment other than trucks 
93 Construction equipment other than trucks 
97 Other vehicle type 
99 Unknown body type 

Class Of Vehicle 

Definition: This variable establishes the class of vehicle. This classification is largely based on 
size. 

Source: Researcher determined – primary source is the vehicle inspection; secondary sources 
include police and other vehicle photographs. Partially determined by VIN information (size-based 
information). 

Cross Reference: Identical to VehicleExterior.VEXVehicleClass when applicable. Identical to 
Events.ClassVehicle when applicable. Identical to Events.ClassVehicle2 when applicable. 

Variable Name: GVEVehicleClass 

Attribute Codes 

Code Meaning 

1 Subcompact/mini (wheelbase < 254 cm) 
2 Compact (wheelbase >= 254 but < 265 cm) 
3 Intermediate (wheelbase >= 265 but < 278 cm) 
4 Full Size (wheelbase >= 278 but < 291 cm) 
5 Largest (wheelbase >= 291 cm) 
9 Unknown passenger car size 
14 Compact utility vehicle 
15 Large utility vehicle (<= 4,536 kg GVWR) 
16 Utility station wagon (<= 4,536 kg GVWR) 
19 Unknown utility type 
20 Minivan (<= 4,536 kg GVWR) 
21 Large van (<= 4,536 kg GVWR) 
24 Van Based school bus (<= 4,536 kg GVWR) 
28 Other van type (<= 4,536 kg GVWR) 
29 Unknown van type (<= 4,536 kg GVWR) 
30 Compact pickup truck (<= 4,536 kg GVWR) 
31 Large pickup truck (<= 4,536 kg GVWR) 
38 Other pickup truck type (<= 4,536 kg GVWR) 
39 Unknown pick up truck (<=4,536 kg GVWR) 
45 Other light truck (<= 4,536 kg GVWR) 
48 Unknown light truck type (<= 4,536 kg GVWR) 


LTCCS Analytical User's Manual GeneralVehicle Data Set • 234 


Variable Definitions and Codes - GeneralVehicle Data Set 

49 Unknown light vehicle type 
50 School bus (excludes van based)(>4,536 kg GVWR) 
58 Other bus (>4,536 kg GVWR) 
59 Unknown bus type 
60 Truck (>4,536 kg GVWR) 
67 Tractor without trailer 
68 Tractor-trailer(s) 
78 Unknown medium/heavy truck type 
79 Unknown light/medium/heavy truck type 
80 Motored cycle 
90 Other vehicle 
99 Unknown 
Curb Weight 

Definition: This variable establishes the weight of the vehicle as specified by the manufacturer. 

Source: Primary source is Passenger Vehicle Specifications, American Automobile 
Manufacturers Association (AAMA) of the U.S., Inc. Secondary sources are Automotive News, 
Crain Automotive Group, Inc., Branham Automobile Reference Book, Branham Publishing 
Company, and Gasoline Truck Index and Diesel Truck Index, Truck Index, Inc. 

Cross Reference: Identical to VehicleExterior.VEXCurbWeight when applicable. Related to 
TruckExterior.TEXEmptyWeight, values will differ due to Curb weight vs. Empty weight. Related 
to the sum of TruckUnits.TUNEmptyWeight over each vehicle, values will differ due to Curb 
weight vs. Empty weight. Related to GeneralVehicle.BaseWeight, values will differ in part due to 
VIN vs. Researcher determined. 

Variable Name: GVECurbWeight 
Attribute Codes 
Code Meaning 

* Actual value (kg) 
777777 Not inspected 
999999 Unknown 
Source Of Curb Weight 

Definition: This variable establishes the source for the weight of the vehicle as reported in the 
variable “Curb Weight.” 
Source: Researcher specified. 
Cross Reference: Identical to VehicleExterior.VEXWeightSource when applicable. 
Variable Name: GVEWeightSource 
Attribute Codes 
Code Meaning 

0 Curb weight unknown 
1 AAMA 
2 Automotive News 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 235 


Variable Definitions and Codes - GeneralVehicle Data Set 

3 Branham Automobile Reference Book 
4 Gasoline Truck, Import Truck, and Diesel Truck Index 
5 Canadian Specifications 
8 Other (specify) 
99 Curb Weight Source Unknown 
Cargo Weight 

Definition: This variable documents the weight of any cargo that is present in the vehicle at the 
time of the crash. This number does not include the weight of any occupants in the vehicle. For 
CDS vehicles that are towing a trailer, this weight represents the weight of the trailer plus its 
cargo. To obtain the cargo weight (only) of cargo being transported by heavy trucks, the variable 
CMBDCargoWeight (Total Cargo Weight) in the TruckExterior Data Set should be used. 

Source: Researcher determined – inputs include vehicle inspection, interviewees, police report, 
and tow facility. 

Cross Reference: Identical to VehicleExterior.VEXCargoWeight when applicable. Related to 
TruckExterior.CMDBCargoWeight, values will differ due to GeneralVehicle.GVECargoWeight 
including the weight of any trailers where TruckExterior.CMDBCargoWeight only includes payload 
cargo weight. Related to the sum of TruckUnits.TUNCargoWeight, values will differ due to 
GeneralVehicle.GVECargoWeight including the weight of any trailers where 
TruckUnits.TUNCargoWeight only includes payload cargo weight. 

Variable Name: GVECargoWeight 

Attribute Codes 

Code Meaning 

* Actual value (kg) 
999999 Unknown 
Source Of Cargo Weight Information 

Definition: This variable establishes the source from which the value reported in the variable 
“Cargo Weight” was obtained. 

Source: Researcher specified. 

Cross Reference: Identical to VehicleExterior.VEXCargoSource when applicable. 

Variable Name: GVECargoSource 

Attribute Codes 

Code Meaning 

0 Cargo weight unknown 
1 Vehicle inspection 
2 Interview 
3 PAR 
4 Tow Yard Operator 
8 Other (specify) 
99 Cargo Weight Source Unknown 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 236 


Variable Definitions and Codes - GeneralVehicle Data Set 

Vehicle Identification Number (VIN) 

Definition: This variable identifies the Vehicle Identification Number (VIN) for this vehicle. 
Source: Primary source is vehicle inspection; a secondary source is the police report. 
Cross Reference: Identical to TruckUnits.TUNVIN if TruckUnits.TUNPosition = 1 when 

applicable. Identical to VehicleExterior.VEXVIN when applicable. 

Variable Name: GVEVIN 

Attribute Codes 
Code* 
9999999999 
Meaning 
Actual VIN value 
Unknown 
Vehicle Special Use 

Definition: This variable establishes any uses for the vehicle outside of personal use. 

Source: Researcher determined – primary source is the police report; secondary sources 
include vehicle inspection, and interviewees. 

Cross Reference: Identical to VehicleExterior.VEXSpecialUse when applicable. 

Variable Name: GVESpecialUse 

Attribute Codes 

Code Meaning 

0 No Special Use 
1 Taxi 
2 Vehicle used as a school bus 
3 Vehicle used as other bus 
4 Military 
5 Police 
6 Ambulance 
7 Fire truck or car 
9 Unknown 
88 Heavy truck 

Inspection Type 

Definition: This variable documents the type of inspection completed for this vehicle. 

Source: Researcher specified. 

Cross Reference: Identical to VehicleExterior.InspectionType when applicable. 

Variable Name: GVEInspection 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 237 


Variable Definitions and Codes - GeneralVehicle Data Set 

Attribute Codes 
Code Meaning 
0 No Inspection 
1 Vehicle fully repaired - no damage evident 
2 Partial inspection (specify): 
3 Complete Inspection 
8 Non qualifying vehicle 

Date Of Inspection 

Definition: This variable documents the date that the vehicle was inspected by the researcher. 

Source: Researcher specified. 

Cross Reference: Identical to VehicleExterior.VEXInspectionDate when applicable. 

Variable Name: GVEInspectionDate 

Attribute Codes 

Code Meaning 

* Date (in YYYY-MM-DD format) 
7777-77-77 Not qualifying vehicles 
8888-88-88 Not inspected 
9999-99-99 Unknown 
Injury Severity Code – Police 

Definition: This variable documents the highest injury severity code in the vehicle, as reported 
by police on the Police Accident Report (PAR). 

Source: Police report. 

Cross Reference: This in conjunction with NonMotorist.ANMPARSevCode aggregated yield 
Crash.CrashPARSevCode. 

Variable Name: GVEPARSevCode 

Attribute Codes 

Code Meaning 

0 O - No injury 
C - Possible injury 
B - Non-incapacitating injury 
A - Incapacitating injury 
K - Killed 
U - Injury, severity unknown 
Died prior to crash 

9 

Unknown 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 238 


Variable Definitions and Codes - GeneralVehicle Data Set 

Injury Severity Code – Researched 

Definition: This variable documents the highest injury severity code in the vehicle, as 
determined by injury coding and case narratives. This code is based on information obtained from 
medical records and/or case narratives and may differ from the police-reported injury severity 
code. 

Source: Zone Center determined – based on occupant medical records and case narratives, 
including the police report. 

Cross Reference: This in conjunction with NonMotorist.ANMRESSevCode aggregated yield 
Crash.CrashRESSevCode. 

Variable Name: GVERESSevCode 

Attribute Codes 
Code0 
1 
2 
3 
4 
Meaning 
O - No injury 
C - Possible injury 
B - Non-incapacitating injury 
A - Incapacitating injury 
K - Killed 
5 
6 
9 
U - Injury, severity unknown 
Died prior to crash 
Unknown 
VIN Make 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Congruent with GeneralVehicle.GVEMake, values will differ due to VIN vs. 
Researcher determined values. Congruent with Overview.OVEMake, values will differ due to VIN 
vs. Researcher determined values. 

Variable Name: VINMake 

Attribute Codes 
Code* 
9999999999 
Meaning 
PCVINA returned value 
Unknown 
VIN Model 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 239 


Variable Definitions and Codes - GeneralVehicle Data Set 

Cross Reference: Congruent with GeneralVehicle.GVEModel, values will differ due to VIN vs. 
Researcher determined values. Congruent with Overview.OVEModel, values will differ due to VIN 
vs. Researcher determined values. 

Variable Name: VINModel 

Attribute Codes 
Code* 
9999999999 
Meaning 
PCVINA returned value 
Unknown 
VIN Year 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Congruent with GeneralVehicle.GVEYear, values will differ due to VIN vs. 
Researcher determined values. Congruent with Overview.OVEYear, values will differ due to VIN 
vs. Researcher determined values. Related to TruckUnits.ManufactureDate if 
TruckUnits.TUNPosition = 1 when applicable. 

Variable Name: VINYear 
Attribute Codes 

Code Meaning 
* PCVINA returned value 
Series 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: Series 


Attribute Codes 
Code* 
Meaning 
PCVINA returned value 
VIN Body Type 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Congruent with GeneralVehicle.GVEBodyType, values will differ due to VIN 
vs. Researcher determined values. Congruent with VehicleExterior.VEXBodyType, values will 
differ due to VIN vs. Researcher determined values. 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 240 


Variable Definitions and Codes - GeneralVehicle Data Set 

Variable Name: VINBodyType 
Attribute Codes 

Code* 
9999999999 
Meaning 
PCVINA returned value 
Unknown 
Roof1 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: Roof1 
Attribute Codes 


Code Meaning 
* PCVINA returned value 
Roof2 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: Roof2 
Attribute Codes 


Code Meaning 
* PCVINA returned value 
Roof3 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 

through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Variable Name: Roof3 

Attribute Codes 
Code Meaning 

* PCVINA returned value 
Front Wheel Drive 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 241 


Variable Definitions and Codes - GeneralVehicle Data Set 

Cross Reference: Congruent with VehicleExterior.DriverWheels, values will differ due to VIN vs. 
Researcher determined values. 

Variable Name: FrontWheelDrive 

Attribute Codes 
Code* 
8 
9 
Meaning 
PCVINA returned value 
Not applicable/No value returned by PCVINA 
Unknown 
Four Wheel Drive 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Congruent with VehicleExterior.DriverWheels, values will differ due to VIN vs. 
Researcher determined values. 

Variable Name: FourWheelDrive 

Attribute Codes 
Code* 
8 
9 
Meaning 
PCVINA returned value 
Not applicable/No value returned by PCVINA 
Unknown 
Restraint Type 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Related to Airbags data set and Occupants.ManualBeltAvailable, but results 
not identical due to VIN vs. Researcher determined values. 

Variable Name: GVERestraintType 
Attribute Codes 

Code Meaning 

* PCVINA returned value 
Carburetion 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: Carburetion 


LTCCS Analytical User's Manual GeneralVehicle Data Set • 242 


Variable Definitions and Codes - GeneralVehicle Data Set 

Attribute Codes 
Code Meaning 

* PCVINA returned value 
888 Not applicable/No value returned by PCVINA 
999 Unknown 
Fuel Type 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: FuelType 
Attribute Codes 
Code Meaning 

* PCVINA returned value 
VIN Weight 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: VINWeight 
Attribute Codes 
Code Meaning 

* PCVINA returned value 
Vehicle Type 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: VehicleType 
Attribute Codes 
Code Meaning 

* PCVINA returned value 
Wheel Configuration 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 243 


Variable Definitions and Codes - GeneralVehicle Data Set 

Variable Name: WheelConfig 
Attribute Codes 
Code Meaning 

* PCVINA returned value 
Daytime Running Lights 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 
Source: Derived variable obtained from PCVINA program (VIN-based). 
Variable Name: DayRunningLights 


Attribute Codes 
Code* 
Meaning 
PCVINA returned value 
Base Weight 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Related to GeneralVehicle.GVECurbWeight, values will differ in part due to 
VIN vs. Researcher determined values. Related to VehicleExterior.VEXCurbWeight, values will 
differ in part due to VIN vs. Researcher determined values. Related to 
TruckExterior.TEXEmptyWeight, values will differ in part due to VIN vs. Researcher determined 
values. Related to the sum of TruckUnits.TUNEmptyWeight, values will differ in part due to VIN 
vs. Researcher determined values. 

Variable Name: BaseWeight 

Attribute Codes 

Code Meaning 

* Actual value (kg) 
9999 Unknown 
Motorcycle Displacement 

Definition: This variable is created by running the vehicle’s Vehicle Identification Number (VIN) 
through the PCVINA computer program. 

Source: Derived variable obtained from PCVINA program (VIN-based). 

Cross Reference: Related to GeneralVehicle.GVEModel (701-709), values will differ in part due 
to VIN vs. Researcher determined values. Related to Overview.OVEModel (701-709), values will 
differ in part due to VIN vs. Researcher determined values. 

Variable Name: GVEMotorcycleDisplacement 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 244 


Variable Definitions and Codes - GeneralVehicle Data Set 

Attribute Codes 
Code* 
88888887 
99999999 
Meaning 
PCVINA returned value 
Not applicable 
Unknown 

Police Reported Travel Speed 

Definition: This variable documents the travel speed of the vehicle (prior to the crash) as 
reported by police on the Police Accident Report (PAR). 

Source: Police report only. 

Cross Reference: Identical to DriverDecisionAggression.ADATravelSpeed. Congruent with 
TruckExterior.TEXSpeed, values will differ due to Police Report vs. Vehicle’s data recorder. 

Variable Name: GVETravelSpeed 
Attribute Codes 
Code Meaning 

* Speed traveled (km/hr) 
9999 Unknown 
Posted Speed 

Definition: This variable establishes the posted speed limit in effect for the crash location. 

Source: Primary sources are scene inspection or statutory law. The police report is a secondary 
source. 
Cross Reference: Identical to DriverDecisionAggression.ADAPostedSpeed. 
Variable Name: GVEPostedSpeed 
Attribute Codes 

Code Meaning 

* Actual posted speed (km/hr) 
9999 Unknown 
Is The Driver Present? 

Definition: This variable serves as a flag to identify driverless motor vehicles in-transport. 
Source: Researcher determined, based on all available evidence. 
Variable Name: DriverPresent 


Attribute Codes 
Code0 
1 
9 
Meaning 
No Driver Present 
Yes 
Unknown 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 245 


Variable Definitions and Codes - GeneralVehicle Data Set 

Police Reported Alcohol Present? 

Definition: This variable establishes whether or not the police report indicates that the driver had 
consumed an alcoholic beverage. Presence is not an indication that alcohol was in any way a 
cause of the crash, even though it might have been. Finding opened or unopened alcoholic 
beverages in the vehicle does not by itself constitute presence. 

Source: Police accident report. 

Cross Reference: Congruent with Crash.CRAAlcohol, values will differ due to Police Report vs. 
Researcher determined values. Congruent with DriverAssessment.AlcoholUse, values will differ 
due to Police Report vs. Researcher determined values. Congruent with Overview.OVEAlcohol, 
values will differ due to Police Report vs. Researcher determined values. 

Variable Name: PARAlcoholPresent 

Attribute Codes 
Code Meaning 
0 
1 
7 
8 
9 
No alcohol present 
Yes alcohol present 
Not reported 
No driver present 
Unknown 

Alcohol Test For Driver 

Definition: This variable establishes whether or not an alcohol test was administered to this 
driver. 
Source: Police accident report. 
Variable Name: PARAlcoholTest 


Attribute Codes 
Code Meaning 
0 Test performed 
95 Test refused 
96 None given 
97 AC test performed, results unknown 
98 No driver present 
99 Unknown 

Alcohol Test Result 

Definition: This variable reports the results of any analytical alcohol test conducted on the 
driver. Sources of information include the police report, medical records, and other official 
sources. 

Source: Police report, carrier records, medical records, or other official sources. 

Cross Reference: Congruent with DriverAssessment.AlcoholTest, values will differ due to Police 
Report vs. Researcher determined values. 

Variable Name: PARAlcoholTestResult 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 246 


Variable Definitions and Codes - GeneralVehicle Data Set 

Attribute Codes 
Code Meaning 
0-1000 Test result value [percent (times 100)] 
8888 No Driver Present 
9999 Unknown 

Time Between Crash And Alcohol Test 

Definition: This variable documents the time delay between the time of the crash and the 
administration of an alcohol test. 

Source: Medical records, police report, carrier records, or other official sources. 

Cross Reference: Congruent with DriverAssessment.TestDelay, values will differ due to Police 
Report vs. Researcher determined. 

Variable Name: PARTestDelay 

Attribute Codes 
Code00:00-90:00 
97:97 
98:98 
Meaning 
Time delayed (in HH:MM format) 
Not applicable 
No BAC test 
99:99 Unknown 

Source Of Alcohol Test Results 

Definition: This variable establishes the source of the data provided in the variable “Alcohol Test 
Results.” 

Source: Police report, medical reports, or other official sources. 

Cross Reference: Congruent with DriverAssessment.TestSource, values will differ due to Police 
Report vs. Researcher determined values. 

Variable Name: PARTestSource 

Attribute Codes 
Code Meaning 
0 No BAC test 
1 Police reported 
2 Company reported 
3 Medical Record 
4 Autopsy 
5 Lay Coroner 
6 No driver present 
8 Other (specify) 
9 Unknown 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 247 


Variable Definitions and Codes - GeneralVehicle Data Set 

Police Reported Other Drug Presence? 

Definition: This variable establishes whether or not the police report indicated that the driver had 
ingested an “other” drug prior to the crash. An “other” drug includes all prescription, over-thecounter medications, as well as “illicit” (illegal) drugs. Police-reported presence of an “other” drug 
is not an indication that the drug usage was in any way the cause of the crash, even though it 
might have been. Finding other drugs in the vehicle does not by itself constitute presence. 

Source: Police report. 

Cross Reference: Congruent with DriverAssessment.DrugTest, values will differ due to Police 
Report vs. Researcher determined values. Congruent with Overview.AnyDrugsVeh, values will 
differ due to Police Report vs. Researcher determined values. Congruent with DriverDrugs data 
set, values will differ due to Police Report vs. Researcher determined values. 

Variable Name: PARDrugsPresent 

Attribute Codes 
Code0 
1 
7 
8 
9 
Meaning 
No other drug(s) present 
Yes, other drug(s) present 
Not reported 
No driver present 
Unknown 
Driver’s Zip Code 

Definition: This variable documents the 5-digit zip code for the driver’s primary residence. 

Source: Primary source is the police report; secondary sources include interviewees, medical 
records, and other official documents. 

Cross Reference: Related to DMVViolation.LicState. Related to IntvwDrDriver.IDRLicenseState, 
values will differ in part due to Interview vs. Researcher determined values. 

Variable Name: ZipCode 
Attribute Codes 
Code Meaning 

* Five-digit zip code 
1 Driver not a resident of U.S. or territories 
99999 Unknown 
Race/Ethnic Origin Of Driver 

Definition: This variable documents the self-identification of race/ethnic origin by the driver. 


Source: Researcher determined – primary source is the interviewee; secondary sources include 
police report, medical records, and other official documents. 
Cross Reference: Identical to Occupants.Race if Occupants.Role = 1.
Variable Name: EthnicOrigin 


LTCCS Analytical User's Manual GeneralVehicle Data Set • 248 


Variable Definitions and Codes - GeneralVehicle Data Set 

Attribute Codes 
Code Meaning 
1 White (non-Hispanic) 
2 Black (non-Hispanic) 
3 White (Hispanic) 
4 Black (Hispanic) 
5 American Indian, Eskimo or Aleut 
6 Asian or Pacific Islander 
7 Other (specify) 
8 No driver present 
9 Unknown 

Commercial Motor Vehicle Crashes 

Definition: This variable reports the number of crashes this driver has been involved in while 
driving a Commercial Motor Vehicle (CMV) in the past 5 years, as reported by the Department of 
Motor Vehicles (DMV). 

Source: DMV records. 

Cross Reference: Congruent with GeneralVehicle.MCMIScrashes, values will differ due to 
CDLIS vs. MCMIS values. Congruent with IntvwDrDriver.CommCrashes, values will differ due to 
Interview vs. CDLIS values. 

Variable Name: CMVCrashes 

Attribute Codes 
Code* 
88 
97 
Meaning 
Actual value 
No driver present 
No official records found 

Commercial Motor Vehicle Violations 

Definition: This variable reports the number of Commercial Motor Vehicle (CMV) violations 
received by this driver in the past 5 years, as reported by the Department of Motor Vehicles 
(DMV). 

Source: DMV records. 

Cross Reference: Related to IntvwDrDriver.CMVCitiations, values will differ due to Citations vs. 
Violations and Interview vs. CDLIS. 

Variable Name: CMVViolations 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 
98 Not a CMV driver 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 249 


Variable Definitions and Codes - GeneralVehicle Data Set 

Non-Commercial Motor Vehicle Crashes 

Definition: This variable reports the number of crashes this driver has been involved in while 
driving a non-commercial motor vehicle in the past 5 years, as reported by the Department of 
Motor Vehicles (DMV). 

Source: DMV records. 

Cross Reference: Congruent with IntvwDrDriver.NonCommCrashes, values will differ due to 
Interview vs. CDLIS values. 

Variable Name: NonCMVCrashes 

Attribute Codes 
Code* 
88 
97 
Meaning 
Actual value 
No driver present 
No official records found 

Non-Commercial Motor Vehicle Violations 

Definition: This variable reports the number of violations received by this driver while driving a 
non-commercial motor vehicle in the past 5 years, as reported by the Department of Motor 
Vehicles (DMV). 

Source: DMV records. 

Variable Name: NonCMVViolations 

Attribute Codes 
Code* 
88 
97 
Meaning 
Actual value 
No driver present 
No official records found 
Total Crashes 

Definition: This variable reports the total number of crashes this driver has been involved in 
while driving any type of vehicle in the past 5 years, as reported by the Department of Motor 
Vehicles (DMV). 

Source: DMV records. 

Variable Name: TotalCrashes 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 250 


Variable Definitions and Codes - GeneralVehicle Data Set 

Total Violations 

Definition: This variable reports the total number of violations received by this driver (both CMV 
and non-CMV) in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

Source: DMV records. 

Cross Reference: Related to the DMVViolations data set, violations pertaining to 5 years prior to 
the crash date. 

Variable Name: GVETotalViolations 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 

Previous Violations 

Definition: This variable reports the total number of violations received by this driver (both CMV 
and non-CMV) in the years previous to the last 5 years, as reported by the Department of Motor 
Vehicles (DMV). 

Source: DMV records. 

Cross Reference: Related to the DMVViolations data set, violations older than 5 years from the 
crash date. 

Variable Name: PrevViolations 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 

Unknown Type Crashes 

Definition: This variable reports the number of crashes this driver has been involved in while 
driving an unknown type vehicle in the past 5 years, as reported by the Department of Motor 
Vehicles (DMV). 

Source: DMV records. 
Variable Name: UnkTypeCrashes 
Attribute Codes 

Code Meaning 

* Actual value 
88 No driver present 
97 No official records found 
LTCCS Analytical User's Manual GeneralVehicle Data Set • 251 


Variable Definitions and Codes - GeneralVehicle Data Set 

MCMIS Crashes 

Definition: This variable reports the number of crashes this driver has been involved in while 
driving a commercial motor vehicle (CMV), as reported to the Motor Carrier Management 
Information System (MCMIS). 

Source: MCMIS records. 

Cross Reference: Congruent with GeneralVehicle.CMVCrashes, values will differ due to CDLIS 
vs. MCMIS values. Congruent with IntvwDrDriver.CommCrashes, values will differ due to 
Interview vs. MCMIS values. 

Variable Name: MCMIScrashes 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 
98 Not a CMV driver 

MCMIS Commercial Motor Vehicle Violations 

Definition: This variable represents the total number of types of inspection violations cited to this 
driver (not including local violations), as reported by the Motor Carrier Management Information 
System (MCMIS). 

Source: MCMIS records. 

Variable Name: MCMIScmvViolations 

Attribute Codes 
Code* 
Meaning 
Actual value 
88 
97 
No driver present 
No official records found 
98 Not a CMV driver 

MCMIS Commercial Motor Vehicle Non-Violations 

Definition: This variable represents the total number of types of “local” inspection violations cited 
to this driver, as reported by the Motor Carrier Management Information System (MCMIS). 
Source: MCMIS records. 
Variable Name: MCMIScmvNonViolations 


Attribute Codes 
Code* 
88 
97 
Meaning 
Actual value 
No driver present 
No official records found 
98 Not a CMV driver 

LTCCS Analytical User's Manual GeneralVehicle Data Set • 252 


Variable Definitions and Codes - HazMat Data Set 

HazMat Data Set 

The HazMat data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and Material uniquely identify each record in this data 
set. CaseID and VehicleNumber should be used to merge the HazMat data set with vehicle level 
data sets. This data set also contains the following variables: 

Source: All variables in this table are researcher determined. Primary source is the Level 1 
Truck Inspection report; secondary sources include driver and carrier interviews. 

Cross Reference: This table is related to TruckExterior.PlacardRequirement and 
TruckUnits.Hazard. 

Hazardous Material 

Definition: This variable establishes the type of hazardous material that the vehicle was 
transporting at the time of the crash, as reported by the Truck Inspector. The attributes are 
FMCSA-generated designations. 

Cross Reference: Related to IntvwCarrier.PrimHazMat and IntvwCarrier.OtherHazMat, values 
will differ in part due to Interview vs. Researcher determined values. 

Variable Name: Material 

Attribute Codes 
Code Meaning 
1 1.1 Explosives 1.1 
2 1.2 Explosives 1.2 
3 1.3 Explosives 1.3 
4 1.4 Explosives 1.4 
5 1.5 Explosives 1.5 
6 1.6 Explosives 1.6 
7 2.1 Flammable Gas 
8 2.2 Nonflammable Gas 
9 2.3 Poisonous Gas 
10 2.1 LPG 
11 2.1 Methane 
12 2.2 Anhydrous Ammon 
13 2.3 Zone A 
14 2.3 Zone B 
15 2.3 Zone C 
16 2.3 Zone D 
17 3 Flammable 
18 3 Zone A 
19 3 (PIH) Zone B 
20 6.1 (Liquids) 
21 3 Combustible Liquid 
22 4.1 Flammable Solid 
23 4.2 Spontan Combust 
24 4.3 Dangerous wn/Wet 
25 5.1 Oxidizer 
26 5.2 Organic Peroxide 

LTCCS Analytical User's Manual HazMat Data Set • 253 


Variable Definitions and Codes - HazMat Data Set 

27 6.2 Infectious Subst 
28 6.1 Zone A 
29 6.1 Zone B 
30 6.1 (Solids) 
31 7 Radioactive Materl 
32 Hwy Route Cntr Qty 
33 8 Corrosive Material 
34 8 (PIH) Zone A 
35 8 (PIH) Zone B 
36 9 Miscellaneous HM 
37 9 (Elev Temp Materl) 
38 9 (Infectious Waste) 
39 9 (Marine Pollutnts) 
40 9 (Hazardous Subst) 
41 9 (Hazardous Waste) 
42 ORM-D 
Reportable? 

Definition: This variable establishes whether or not the hazardous material that was being 
transported was a reportable quantity, as reported by the Truck Inspector. This is an FMCSA-
generated variable. 

Variable Name: Reportable 
Attribute Codes 
Code Meaning 

1 Yes 
2 No 
99 Unknown 

Hazardous Material Waiver? 

Definition: This variable establishes whether or not the carrier had a waiver in place for the 
hazardous material that was being transported at the time of the crash, as reported by the Truck 
Inspector. This is an FMCSA-generated variable. 

Variable Name: Waiver 

Attribute Codes 
Code1 
2 
99 
Meaning 
Yes 
No 
Unknown 

LTCCS Analytical User's Manual HazMat Data Set • 254 


Variable Definitions and Codes - HazMatInsp Data Set 

HazMatInsp Data Set 

The HazMatInsp data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and HMIInspection uniquely identify each record in this 
data set. CaseID and VehicleNumber should be used to merge the HazMatInsp data set with 
vehicle level data sets. This data set also contains the following variables: 

Source: The source for all variables in this table is the Level 1 Truck Inspection report. 

Hazardous Material Inspection 

Definition: This variable is a listing of the inspection items required by FMCSA, to be completed 
by the Truck Inspector, when the truck is transporting hazardous materials. This is an FMCSA-
generated variable. 

Variable Name: HMIInspection 

Attribute Codes 
Code Meaning 
1 Ship paper/manifest (HA) 
2 HM license (HB) 
3 HW registration (HC) 
4 Placards (HD) 
5 Packaging (HE) 
6 Markings (HF) 
7 Labels (HG) 
8 Loading/securement (HH) 
9 Cargo/portable tanks (HI) 
10 Safety equipment (HJ) 
11 Not applicable 
12 (Inspection not required) 
99 Unknown 

Inspection Exists? 

Definition: This variable establishes whether or not the truck was inspected by a certified North 
American Commercial Vehicle Inspector, and that an official truck inspection document exists. 

Variable Name: InspectionExists 

Attribute Codes 

Code Meaning 

Yes Yes 
No No 
N/A Not applicable 
UNK Unknown 

Violation? 

Definition: This variable indicates whether or not the items listed in the variable “Hazardous 
Material Inspection” are in violation of FMCSA standards. This is an FMCSA-generated variable. 

LTCCS Analytical User's Manual HazMatInsp Data Set • 255 


Variable Definitions and Codes - HazMatInsp Data Set 

Cross Reference: Related to TruckInspection.TINViolationCode (when the code relates to 
Hazardous Material Violations). 

Variable Name: HMIViolation 

Attribute Codes 
Code1 
2 
9 
Meaning 
Yes 
No 
Unknown 
Out-Of-Service? 

Definition: This variable establishes whether or not a particular violation is classified as “out-ofservice.” This variable is related to the “Violation” variable, which is related to the “Hazardous 
Material Inspection” variable. This is an FMCSA-generated variable. 

Cross Reference: Related to TruckInspection.TINOutofService. 

Variable Name: HMIOutOfService 

Attribute Codes 
Code1 
2 
9 
Meaning 
Yes 
No 
Unknown 
Disposition 

Definition: This variable documents the disposition of each violation (how it was handled) by the 
Truck Inspector. This variable is related to the “Violation” variable, which is related to the 
“Hazardous Material Inspection” variable. This is an FMCSA-generated variable. 

Cross Reference: Related to TruckInspection.TINDisposition. 

Variable Name: HMIDisposition 

Attribute Codes 

Code Meaning 

1 Repaired at scene 
2 Towed/Escorted 
3 Other (specify) 
8 Not applicable 
9 Unknown 

LTCCS Analytical User's Manual HazMatInsp Data Set • 256 


Variable Definitions and Codes - Injuries Data Set 

Injuries Data Set 

The Injuries data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber, OccupantNumber and InjuryNumber. OccupantNumber is assigned to each 
occupant in a vehicle. InjuryNumber is assigned to each occupant’s injuries. CaseID, 
VehicleNumber, OccupantNumber and InjuryNumber uniquely identify each record in this data 
set. CaseID, VehicleNumber and OccupantNumber should be used to merge the Injuries data 
set with the Occupant data sets. This data set also contains the following variables: 

Occupant Injury Description 

Definition: This variable provides a description of each injury. 

Source: Zone Center determined – inputs include driver interview and medical records. 

Variable Name: OINDescription 

Attribute Codes 
Code Meaning 
* AIS code provided in text format 

AIS Code 

Definition: This variable is a listing of the Abbreviated Injury Scale (AIS) codes. The AIS is a 
numerical method for ranking and comparing injuries by severity. 

Source: Zone Center determined – inputs include driver interview and medical records. 

Variable Name: AISCode 

Attribute Codes 

Code Meaning 

1130006 Head Crush 
1150997 Closed head injury/blunt head trauma/traumatic brain injury NFS 
1152997 Traumatic brain injury NFS 
1159997 Closed Head Injury (Died Without Further Evaluation - No Autopsy) 
1202025 Anterior cerebral artery laceration 
1202043 Anterior cerebral artery thrombosis (occlusion) 
1202063 Anterior cerebral artery traumatic aneurysm 
1202993 Anterior cerebral artery NFS 
1204025 Basilar artery laceration 
1204045 Basilar artery thrombosis (occlusion) 
1204065 Basilar Artery Traumatic Aneurysm 
1204995 Basilar artery NFS 
1206024 Carotid-cavernous fistula 
1208024 Cavernous sinus laceration 
1208045 Cavernous sinus open laceration or segmental loss 
1208063 Cavernous sinus thrombosis (occlusion) 
1208993 Cavernous sinus NFS 
1210025 Internal carotid artery laceration 
1210044 Internal carotid artery thrombosis (occlusion) 

LTCCS Analytical User's Manual Injuries Data Set • 257 


Variable Definitions and Codes - Injuries Data Set 

1210063 Internal carotid artery traumatic aneurysm 
1210993 Internal carotid artery NFS 
1212024 Intracranial vessel laceration 
1212043 Intracranial vessel thrombosis (occlusion) 
1212063 Intracranial vessel traumatic aneurysm 
1212993 Intracranial vessel NFS 
1214025 Middle cerebral artery laceration 
1214044 Middle cerebral artery thrombosis (occlusion) 
1214063 Middle cerebral artery traumatic aneurysm 
1214993 Middle cerebral artery NFS 
1216024 Other head artery laceration 
1216043 Other head artery thrombosis (occlusion) 
1216063 Other head artery traumatic aneurysm 
1216993 Other head artery NFS 
1218025 Posterior cerebral artery laceration 
1218043 Posterior cerebral artery thrombosis (occlusion) 
1218063 Posterior cerebral artery traumatic aneurysm 
1218993 Posterior cerebral artery NFS 
1220024 Sigmoid sinus laceration 
1220045 Sigmoid sinus open laceration or segmental loss 
1220064 Sigmoid sinus thrombosis (occlusion) 
1220994 Sigmoid sinus NFS 
1222024 Sinus or major vein laceration 
1222043 Sinus or major vein thrombosis (occlusion) 
1222993 Sinus NFS or major vein NFS 
1224024 Superior longitudinal (saggital) sinus laceration 
1224045 Superior longitudinal (saggital) sinus open laceration or segmental loss 
1224064 Superior longitudinal (saggital) sinus thrombosis (occlusion) 
1224994 Superior longitudinal (saggital) sinus NFS 
1226024 Transverse sinus laceration 
1226045 Transverse sinus open laceration or segmental loss 
1226064 Transverse sinus thrombosis (occlusion) 
1226994 Transverse sinus NFS 
1228025 Vertebral artery laceration 
1228043 Vertebral artery thrombosis (occlusion) 
1228063 Vertebral artery traumatic aneurysm 
1228993 Vertebral artery NFS 
1302022 Cranial nerve contusion 
1302042 Cranial nerve laceration 
1302992 Cranial nerve NFS 
1304022 I Olfactory nerve contusion 
1304042 I Olfactory nerve laceration 
1304992 I Olfactory nerve NFS 
1306022 II Optic nerve--intracranial and intracanalicular segments contusion 
1306042 II Optic nerve--intracranial and intracanalicular segments contusion bilateral 
1306062 II Optic nerve--intracranial and intracanalicular segments laceration 
1306082 II Optic nerve--intracranial and intracanalicular segments laceration bilateral 
1306992 II Optic nerve--intracranial and intracanalicular segments NFS 
1308022 III Oculomotor nerve contusion or compression 

LTCCS Analytical User's Manual Injuries Data Set • 258 


Variable Definitions and Codes - Injuries Data Set 

1308042 III Ooculomotor nerve laceration 
1308992 III Oculomotor nerve NFS 
1310022 IV Trochlear nerve contusion 
1310042 IV Trochlear nerve laceration 
1310992 IV Trochlear nerve NFS 
1312022 V Trigeminal nerve contusion 
1312042 V Trigeminal nerve laceration 
1312992 V Trigeminal nerve NFS 
1314022 VI Abducens nerve contusion 
1314042 VI Abducens nerve laceration 
1314992 VI Abducens nerve NFS 
1316022 VII Facial nerve contusion 
1316042 VII Facial nerve laceration 
1316992 VII Facial nerve NFS 
1318022 VIII Acoustic Nerve contusion 
1318042 VIII Acoustic Nerve laceration 
1318062 VIII Acoustic Nerve laceration bilateral 
1318992 VIII Acoustic Nerve NFS 
1320022 IX Glossopharyngeal nerve contusion 
1320042 IX Glossopharyngeal nerve laceration 
1320992 IX Glossopharyngeal nerve NFS 
1322022 X Vagus nerve contusion 
1322042 X Vagus nerve laceration 
1322992 X Vagus nerve NFS 
1324022 XI Spinal accessory nerve contusion 
1324042 XI Spinal accessory nerve laceration 
1324992 XI Spinal accessory nerve NFS 
1326022 XII Hypoglossal nerve contusion 
1326042 XII Hypoglossal nerve laceration 
1326992 XII Hypoglossal nerve NFS 
1402025 Brain stem compression 
1402045 Brain stem contusion 
1402065 Brain stem diffuse axonal injury (white matter shearing) 
1402085 Brain stem infarction 
1402105 Brain stem injury involving hemorrhage 
1402126 Brain stem laceration 
1402146 Brain stem massive destruction 
1402166 Brain stem penetrating injury 
1402186 Brain stem transection 
1402995 Brain stem NFS 
1404023 Cerebellum contusion, single or multiple, NFS 
1404033 Cerebellum contusion small 
1404044 Cerebellum contusion large 
1404055 Cerebellum contusion extensive 
1404065 Cerebellum diffuse axonal injury (white matter shearing) 
1404104 Cerebellum hematoma/hemorrhage NFS - extra axial 
1404144 Cerebellum hematoma/hemorrhage epidural or extradural NFS 
1404184 Cerebellum hematoma/hemorrhage epidural or extradural small 
1404225 Cerebellum epidural or extradural hematoma/hemorrhage large 

LTCCS Analytical User's Manual Injuries Data Set • 259 


Variable Definitions and Codes - Injuries Data Set 

1404264 Cerebellum hematoma/hemorrhage intracerebellar NFS 

1404304 Cerebellum hematoma/hemorrhage intracerebellar small 

1404345 Cerebellum hematoma/hemorrhage intracerebellar large 

1404384 Cerebellum hematoma/hemorrhage subdural NFS 

1404424 Cerebellum hematoma/hemorrhage subdural small 

1404465 Cerebellum hematoma/hemorrhage subdural large 

1404503 Cerebellum brain swelling/edema 

1404543 Cerebellum edema 

1404583 Cerebellum infarction 

1404623 Cerebellum ischemia 

1404663 Cerebellum subarachnoid hemorrhage 

1404703 Cerebellum subpial hemorrhage 

1404744 Cerebellum laceration 

1404785 Cerebellum penetrating injury 

1404993 Cerebellum NFS 

1406023 Cerebrum contusion NFS 

1406043 Cerebrum contusion single NFS 

1406063 Cerebrum contusion single small 

1406084 Cerebrum contusion single large 

1406105 Cerebrum contusion single extensive 

1406113 Cerebrum Contusions - multiple NFS 

1406123 Cerebrum contusion multiple, on same side NFS 

1406143 Cerebrum contusion multiple, on same side small 

1406164 Cerebrum contusion multiple, on same side large 

1406185 Cerebrum contusion multiple, on same side extensive 

1406203 Cerebrum contusion multiple, at least one on each side but NFS 

1406223 Cerebrum contusion multiple, at least one on each side small 

1406244 Cerebrum contusion multiple, at least one on each side large 

1406265 Cerebrum contusion multiple, at least one on each side extensive 

1406285 Cerebrum diffuse axonal injury (white matter shearing) 

1406294 Cerebrum hematoma/hemorrhage NFS - extra axial 

1406304 Cerebrum hematoma/hemorrhage epidural or extradural NFS 

1406324 Cerebrum hematoma/hemorrhage epidural or extradural small 

1406345 Cerebrum hematoma/hemorrhage epidural or extradural small bilateral 

1406365 Cerebrum hematoma/hemorrhage epidural or extradural large 

1406384 Cerebrum hematoma/hemorrhage intracerebral NFS 

1406404 Cerebrum hematoma/hemorrhage intracerebral small 

1406424 Cerebrum hematoma/hemorrhage intracerebral small petechial 

hemorrhage(s) 

1406444 Cerebrum hematoma/hemorrhage intracerebral small subcortical 

hemorrhage 

1406465 Cerebrum hematoma/hemorrhage intracerebral bilateral 

1406485 Cerebrum hematoma/hemorrhage intracerebral large 

1406504 Cerebrum hematoma/hemorrhage subdural NFS 

1406524 Cerebrum hematoma/hemorrhage subdural small 

1406545 Cerebrum hematoma/hemorrhage subdural small bilateral 

1406565 Cerebrum hematoma/hemorrhage subdural large 

1406603 Cerebrum brain swelling/edema NFS 

1406623 Cerebrum brain swelling mild 

1406644 Cerebrum brain swelling moderate 

LTCCS Analytical User's Manual Injuries Data Set • 260 


Variable Definitions and Codes - Injuries Data Set 

1406665 Cerebrum brain swelling severe 
1406683 Cerebrum edema NFS 
1406703 Cerebrum edema mild 
1406724 Cerebrum edema moderate 
1406745 Cerebrum edema severe 
1406763 Cerebrum infarction 
1406784 Cerebrum intraventricular hemorrhage/intracerebral hematoma in ventricular 

system 
1406803 Cerebrum ischemia (directly related to trauma) 
1406823 Cerebrum pneumocephalus (directly related to trauma) 
1406843 Cerebrum subarachnoid hemorrhage 
1406863 Cerebrum subpial hemorrhage 
1406884 Cerebrum laceration 
1406905 Cerebrum penetrating injury 
1406993 Cerebrum NFS (use if described as 'brain' injury) 
1407993 Pituitary injury 
1500002 Skull fracture NFS 
1502003 Base (basilar) skull fracture NFS 
1502023 Base (basilar) skull fracture without CSF leak 
1502043 Base (basilar) skull fracture with CSF leak 
1502064 Base (basilar) skull fracture complex 
1504002 Vault skull fracture NFS 
1504022 Vault skull fracture closed 
1504043 Vault skull fracture comminuted 
1504064 Vault skull fracture complex 
1504084 Vault skull fracture massively depressed 
1602022 Length of Unconsciousness < 1 Hr. 
1602043 Length of Unconsciousness known to be <1 hr. with neurological deficit 
1602063 Length of Unconsciousness known to be 1-6 hrs. 
1602084 Length of Unconsciousness known to be 1-6 hrs. with neurological deficit 
1602104 Length of Unconsciousness known to be 6-24 hrs. 
1602125 Length of Unconsciousness known to be 6-24 hrs. with neurological deficit 
1602145 Length of Unconsciousness known to be > 24 hrs. 
1604021 Awake post resuscitation on Admission or Initial Observation at Scene 

(GCS 15) no prior unconsciousness 

1604042 Awake post resuscitation on Admission or Initial Observation at Scene 
(GCS 15) no prior unconsciousness with neurological deficit 
1604062 Awake post resuscitation on Admission or Initial Observation at Scene 

(GCS 15) prior unconsciousness, but length of time NFS 
1604083 Awake post resuscitation on Admission or Initial Observation at Scene 
(GCS 15) prior unconsciousness with neurological deficit 
1604102 Awake post resuscitation on Admission or Initial Observation at Scene 

(GCS 15) amnesia 
1604123 Awake post resuscitation on Admission or Initial Observation at Scene 
(GCS 15) amnesia with neurological deficit 
1604142 Awake post resuscitation on Admission or Initial Observation at Scene 
(GCS 15) unconsciousness known to be < 1 hr. 
1604163 Awake post resuscitation on Admission or Initial Observation at Scene 
(GCS 15) unconsciousness known to be <1 hr. with neurological deficit 
1604991 Awake post