Safety Measurement System - Complete SMS Profile (U.S. DOT# 649091)

WALKER-HILL ENVIRONMENTAL INC

U.S. DOT#: 649091

Number of Vehicles: 67
Number of Drivers: 77
Number of Inspections: 36

Safety Rating & OOS Rates AND Licensing and Insurance

As part of FMCSA’s IT modernization strategy, we are in the process of merging our data platforms to make it easier for you to find the information you need. During this transition, please refer to the links below for additional information about this carrier.

For licensing and insurance information, visit Motus: USDOT Registration System.
For safety rating and Out-of-Service (OOS) rates, visit SAFER.
If you are a motor carrier looking for your Inspection Selection System (ISS) value, log in to the FMCSA Portal.

BASIC Status (Public Property Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending May 15, 2026

On-Road Performance
0.33 Measure	Not Public	0.32 Measure	2.29 Measure	0 Measure	Not Public	0.71 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 3 Safety Event Group: 3-4 driver inspections with Unsafe Driving Violations Avg. PU × UF: 65 Segment: Straight Carrier	Not Public	Driver Inspections: 36 with HOS Compliance Violations: 3 Safety Event Group: 21-100 relevant driver inspections	Vehicle Inspections: 28 with Vehicle Maint. Violations: 8 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 36 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 36 with Driver Fitness Violations: 4 Safety Event Group: 21-100 relevant driver inspections
Investigation Results
No Acute/Critical Violations Discovered	N/A	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	Not Public	No Acute/Critical Violations Discovered

Select a BASIC icon above to get details, or view your Complete SMS Profile.

Violation Summary

Violations: 26


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.16	Failing to use seat belt while operating a CMV	1	0	7	Unsafe Driving
392.2C	Failure to obey traffic control device	1	0	5	Unsafe Driving
392.2-SLLTCD	State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety official, signal, sign, light, lane marking, other	1	0	5	Unsafe Driving
395.22G-ELDMFV	HOS (ELD) - A portable ELD is not mounted in a fixed position and visible to the driver when seated in the normal driving position.	1	0	1	HOS Compliance
395.22H4-ELDBRODS	HOS (ELD) - In-Vehicle Information - Failing to have a supply of blank driver's records of duty status graph-grids sufficient to record the driver's duty status and other related information for a minimum of 8 days.	1	0	1	HOS Compliance
395.3A2-HOSPD	HOS (Property) - Driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Time	1	0	7	HOS Compliance
395.3A2HOSPRNP	Driving beyond 14 hour duty period. (Property carrying vehicle) - Nominal Violation	1	0	1	HOS Compliance
383.23A2-LCDLN	License (CDL) - Operate a CMV and does not possess a valid CDL	1	1	8	Driver Fitness
383.91A-LCDL	License (CDL) - Operate a CMV without proper CDL class	1	1	8	Driver Fitness
391.11B5-DNL	Driver does not have a valid operator's license for the CMV being operated	1	1	8	Driver Fitness
391.41A-MCPC	Medical (Certificate) - Operating a commercial motor vehicle without showing proof of a valid medical certification upon request when medical certification is required.	1	1	1	Driver Fitness
392.9A2-C	Cargo - Vehicle components or dunnage not secured	1	0	1	Vehicle Maint.
393.23-LEU	Lighting - All electrical systems on towed vehicle(s) inoperative due to no electrical connection (e.g., unplugged or loose pigtail)	1	1	2	Vehicle Maint.
393.43D-B	Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly	1	1	4	Vehicle Maint.
393.43DBMA	Brake - Breakaway not attached to the towing vehicle	1	1	4	Vehicle Maint.
393.60(c)	Windshield - Damaged or Discolored	1	0	1	Vehicle Maint.
393.75A1-TEPBM	Tires - All others - Exposed ply or belt material in tread or sidewall area	1	1	8	Vehicle Maint.
393.75A3-TAOL	Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS	1	1	8	Vehicle Maint.
393.75G-TAOW	Tires - All others, weight carried exceeds tire load limit	1	1	3	Vehicle Maint.
393.95A1	Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.	1	0	2	Vehicle Maint.
393.9A-LFTSI	Lighting - Front - Turn signal - inoperative	1	0	6	Vehicle Maint.
393.9A-LIL	Lighting - Identification lamp(s) inoperative	2	0	2	Vehicle Maint.
393.9A-LLPL	Lighting - License plate lamp inoperative	1	0	2	Vehicle Maint.
393.9A-LSML	Lighting - Side marker lamp(s) inoperative	2	0	2	Vehicle Maint.

Inspection History

Total Inspections: 36


Report			Vehicle			Measure
Inspection Date	Number	State	Plate Number	Plate State	Type	Severity Weight (SW)	Time Weight (TiW)

3/12/2026	AL1260005482	AL	A524369	MS	STRAIGHT TRUCK		3
HOS Compliance Violation: 395.22H4-ELDBRODS HOS (ELD) - In-Vehicle Information - Failing to have a supply of blank driver's records of duty status graph-grids sufficient to record the driver's duty status a						1
Vehicle Maint. Violation: 393.9A-LIL Lighting - Identification lamp(s) inoperative						2
3/4/2026	TNI034Y62453	TN	A554613	MS	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.43D-B Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly (OOS)						4 + 2 (OOS)
3/1/2026	MS6626401802	MS	A559288	MS	STRAIGHT TRUCK		3
2/12/2026	MS7639002414	MS	A524398	MS	TRUCK TRACTOR		3
2/3/2026	TNI01RA82403	TN	A554613	MS	TRUCK TRACTOR		3
1/12/2026	FL4308005565	FL	A532230	MS	STRAIGHT TRUCK		3
12/6/2025	LALAPJS01515	LA	A524410	MS	TRUCK TRACTOR		3
12/3/2025	MS6643028591	MS	A548720	MS	STRAIGHT TRUCK		3
11/6/2025	MS7641151581	MS	A542397	MS	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.23-LEU Lighting - All electrical systems on towed vehicle(s) inoperative due to no electrical connection (e.g., unplugged or loose pigtail) (OOS)						2 + 2 (OOS)
Vehicle Maint. Violation: 393.43DBMA Brake - Breakaway not attached to the towing vehicle (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.9A-LFTSI Lighting - Front - Turn signal - inoperative						6
10/13/2025	TNI034Y62098	TN	A524386	MS	TRUCK TRACTOR		2
Driver Fitness Violation: 383.23A2-LCDLN License (CDL) - Operate a CMV and does not possess a valid CDL (OOS)						8 + 2 (OOS)
10/9/2025	MS7642004577	MS	B307388	MS	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.9A-LIL Lighting - Identification lamp(s) inoperative						2
Vehicle Maint. Violation: 393.9A-LLPL Lighting - License plate lamp inoperative						2
9/29/2025	MS6628006040	MS	A524366	MS	TRUCK TRACTOR		2
9/29/2025	FL3701006857	FL	A524372	MS	STRAIGHT TRUCK		2
9/19/2025	FL4308005344	FL	A524405	MS	STRAIGHT TRUCK		2
Unsafe Driving Violation: 392.2-SLLTCD State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety official, signal, sign, light, lane marking, other						5
8/18/2025	MSMC00512014	MS	A524279	MS	TRUCK TRACTOR		2
Driver Fitness Violation: 391.41A-MCPC Medical (Certificate) - Operating a commercial motor vehicle without showing proof of a valid medical certification upon request, but presents proof prior to com (OOS)						1 + 2 (OOS)
8/8/2025	MSMC00511984	MS	A524362	MS	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.75A1-TEPBM Tires - All others - Exposed ply or belt material in tread or sidewall area (OOS)						8 + 2 (OOS)
HOS Compliance Violation: 395.3A2HOSPRNP Driving beyond 14 hour duty period. (Property carrying vehicle) - Nominal Violation						1
Vehicle Maint. Violation: 393.60(c) Windshield - Damaged or Discolored						1
6/16/2025	FL1952006391	FL	A524389	MS	STRAIGHT TRUCK		2
6/11/2025	AR7920001055	AR	A524412	MS	TRUCK TRACTOR		2
5/21/2025	AL1785004523	AL	A553975	MS	STRAIGHT TRUCK		2
5/15/2025	AL1118007410	AL	A524376	MS	STRAIGHT TRUCK		2
HOS Compliance Violation: 395.22G-ELDMFV HOS (ELD) - A portable ELD is not mounted in a fixed position and visible to the driver when seated in the normal driving position.						1
HOS Compliance Violation: 395.3A2-HOSPD HOS (Property) - Driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Tim						7
5/12/2025	MS1018011912	MS	A524386	MS	TRUCK TRACTOR		1
4/30/2025	AL1293004456	AL	A524426	MS	STRAIGHT TRUCK		1
4/28/2025	FL2883003254	FL	A524405	MS	STRAIGHT TRUCK		1
4/17/2025	IL5005430107	IL	A524112	MS	TRUCK TRACTOR		1
2/20/2025	ALMBJP006395	AL	A524366	MS	STRAIGHT TRUCK		1
2/17/2025	FL3706007781	FL	A532230	MS	STRAIGHT TRUCK		1
1/20/2025	MOW035005308	MO	A524112	MS	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 393.9A-LSML Lighting - Side marker lamp(s) inoperative						2
Vehicle Maint. Violation: 393.75A3-TAOL Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS (OOS)						8 + 2 (OOS)
Vehicle Maint. Violation: 393.75G-TAOW Tires - All others, weight carried exceeds tire load limit (OOS)						3 + 2 (OOS)
Driver Fitness Violation: 383.91A-LCDL License (CDL) - Operate a CMV without proper CDL class (OOS)						8 + 2 (OOS)
10/21/2024	LALARN000413	LA	A524388	MS	STRAIGHT TRUCK		1
9/19/2024	LALANM004656	LA	B203709	MS	STRAIGHT TRUCK		1
Unsafe Driving Violation: 392.16 Failing to use seat belt while operating a CMV						7
8/29/2024	MS7647000592	MS	A532780	MS	STRAIGHT TRUCK		1
Unsafe Driving Violation: 392.2C Failure to obey traffic control device						5
Driver Fitness Violation: 391.11B5-DNL Driver does not have a valid operator's license for the CMV being operated (OOS)						8 + 2 (OOS)
8/19/2024	MS0705010184	MS	A524376	MS	STRAIGHT TRUCK		1
8/19/2024	TNI01RA80543	TN	A524390	UK	TRUCK TRACTOR		1
Vehicle Maint. Violation: 392.9A2-C Cargo - Vehicle components or dunnage not secured						1
6/25/2024	MSU071005977	MS	A524381	MS	TRUCK TRACTOR		1
6/24/2024	ALL266000174	AL	A524369	MS	STRAIGHT TRUCK		1
6/6/2024	FL2829008657	FL	A524382	MS	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 393.95A1 Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.						2
Vehicle Maint. Violation: 393.9A-LSML Lighting - Side marker lamp(s) inoperative						2
5/31/2024	MS5017101810	MS	A524388	MS	STRAIGHT TRUCK		1

Reviewed-Not Preventable Crash Activity (vehicles involved in crashes)

Total Number of Crashes: 0

This carrier has no crashes to display.

Crashes Included in SMS (vehicles involved in crashes)

Total Number of Crashes: 4


Report			Vehicle		Crash				Measure = Sum of the Total Weight (TotW)
Date	Number	State	Plate Number	Plate State	Fatal	Inj.	Tow.	HM	Severity Weight (SW)	Time Weight (TiW)	Total Weight (TotW)

1/27/2026	LA2026009087	LA	A524380	MS	0	0	Yes	No	1	3	3
11/7/2025	MS2025064704	MS	A524427	MS	0	1	Yes	No	2	2	4
2/6/2025	MS9054250004	MS	A524418	MS	0	0	Yes	No	1	1	1
11/13/2024	LA2024146710	LA	A524417	MS	0	1	Yes	No	2	1	2
11/13/2024	LA2024146710	LA	A524409	MS	0	1	Yes	No

Investigation Results

Acute/Critical Violations: 0

This carrier has no Acute/Critical violations to display.

Summary of Activities

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation: 12/19/2023 (Non-Ratable Review)
Total Inspections: 36
- Total Inspections without Violations used in SMS: 22
- Total Inspections with Violations used in SMS: 14
Total Crashes* : 4

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Continue for more Crash, Inspection & Investigation Details

Carrier Registration

Carrier Registration Details Subject to General Threshold Update Registration Info

Inspection Selection System

For licensing and insurance information, visit Motus: USDOT Registration System.
For safety rating and Out-of-Service (OOS) rates, visit SAFER.
If you are a motor carrier looking for your Inspection Selection System (ISS) value, log in to the FMCSA Portal.

Enforcement Cases

(Six years as of 06/19/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 649091

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 5/15/2026, updated monthly)

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation: 12/19/2023 (Non-Ratable Review)	Total Inspections: 36 Total inspections without violations used in SMS: 22 Total inspections with violations used in SMS: 14	Total Crashes: 4*
12/19/2023 (Non-Ratable Review) 10/23/2009 (Compliance Review) 10/28/2008 (Compliance Review) 12/20/2007 (Compliance Review)	# Insp. OOS Driver Inspections 36 11.1% Vehicle Inspections 28 14.3% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 2 Towaway Crashes 2

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Downloads

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Average PU × Utilization Factor (as of 5/15/2026, updated monthly)

The SMS normalizes the Unsafe Driving and Crash Indicator BASICs measure by carrier size (i.e., a hybrid power unit and vehicle miles travelled measure) to account for exposure. Carrier size is defined as average power units multiplied by the utilization factor.

65 Average PU × Utilization Factor = 65 Average Power Units × 1 Utilization Factor

Average Power Units
Utilization Factor

In order to account for changes in a carrier's fleet size during the previous 24 months an average power unit value is used in the calculation to determine a carrier's Unsafe Driving BASIC and Crash Indicator measures.

65 Average Power Units = 67 Current Power Units + 67 Power Units 6 Months Ago + 61 Power Units 18 Months Ago
3

The Utilization Factor is a multiplier that adjusted the average PU values based on the utilization in terms of VMT per average PU.

Determine Carrier Segment: Straight
Straight trucks/other vehicles constituting more than 30% of the total PU
U.S. DOT# 649091 = 89% Straight trucks/other vehicles
Determine VMT per Average Power Unit
17,538 VMT per Average Power Unit = 1,140,000 VMT From Registration (MCS-150) ÷ 65 Average Power Units

Based on Step 1 and 2 calculate the Utilization Factor

Straight Segment
Meets Criteria	VMT per Avgerage PU	Utilization Factor
	< 20,000	1
	20,000 – 60,000	1 = VMT per PU ÷ 20,000
	60,000 – 200,000	3
	> 200,000	1
	No Recent VMT Information	1

Use of SMS Data/Information

FAST Act of 2015:

Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier has received an UNSATISFACTORY safety rating under part 385 of title 49, Code of Federal Regulations, or has otherwise been ordered to discontinue operations by the Federal Motor Carrier Safety Administration, it is authorized to operate on the Nation's roadways.

Safety Measurement System:

The data in the Safety Measurement System (SMS) is performance data used by the Agency and Enforcement Community. A symbol, based on that data, indicates that FMCSA may prioritize a motor carrier for further monitoring.

The symbol is not intended to imply any federal safety rating of the carrier pursuant to 49 USC 31144. Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier in the SMS has received an UNSATISFACTORY safety rating pursuant to 49 CFR Part 385, or has otherwise been ordered to discontinue operations by the FMCSA, it is authorized to operate on the nation's roadways.

Motor carrier safety ratings are available at http://safer.fmcsa.dot.gov and motor carrier licensing and insurance status are available at http://li-public.fmcsa.dot.gov/.