Safety Measurement System - Complete SMS Profile (U.S. DOT# 2284804)

S B COX READY MIX INC

U.S. DOT#: 2284804

Address: 2160 LANIER LANE
ROCKVILLE, VA 23146
Number of Vehicles: 84
Number of Drivers: 56
Number of Inspections: 21

Safety Rating & OOS Rates

(As of 01/24/2026 updated daily from SAFER )

Not Rated

Out of Service Rates

Type	OOS %	National Avg %
Vehicle	50.0	23.2
Driver	9.1	6.4
Hazmat		4.4

Licensing and Insurance

(As of 01/24/2026 updated hourly from L&I )

Active For-Hire Authority
Type	Yes/No	MC#/MX#
Property	No
Passenger	No
Household Goods	No
Broker	No

BASIC Status (Public Property Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending December 26, 2025

On-Road Performance
0.13 Measure	Not Public	0 Measure	6.89 Measure	0 Measure	Not Public	0.65 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 2 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 84.3 Segment: Straight Carrier	Not Public	Driver Inspections: 21 with HOS Compliance Violations: 0 Safety Event Group: 21-100 relevant driver inspections	Vehicle Inspections: 8 with Vehicle Maint. Violations: 7 Safety Event Group: 5-10 relevant vehicle inspections	Driver Inspections: 21 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 21 with Driver Fitness Violations: 3 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: 23


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.16-D	Driver - Failed to use seat belt while operating a CMV.	1	0	7	Unsafe Driving
392.2-SLLS2	State/Local Laws - Speeding 6-10 miles per hour over the speed limit.	1	0	4	Unsafe Driving
391.11B5-LNCDLNVE	License (Non-CDL) - Endorsement - Operate a CMV without proper endorsement or in violation of restriction. NOTE: Other than a 391.41 violation.	1	1	8	Driver Fitness
391.41B10-MC	Medical (Certificate) - Operating a commercial vehicle without corrective lenses or hearing aid as indicated on the driver's medical certificate.	1	1	2	Driver Fitness
392.2-MCSR	Medical (Certificate) - Operating a CMV while in violation of state medical certification regulations.	1	0	1	Driver Fitness
392.9A2-C	Cargo - Vehicle components or dunnage not secured.	1	1	1	Vehicle Maint.
393.47(e)	Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt	2	0	4	Vehicle Maint.
393.53B-B	Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear.	2	0	4	Vehicle Maint.
393.55(c)(1)	Truck Tractor manufactured on or after March 1, 1997 not equipped with an antilock brake system.	2	0	4	Vehicle Maint.
393.55C2-B	Air Brake - CMV other than truck-tractor manufactured on or after March 1, 1998 not equipped with an antilock brake system. System does not function or indicates a fault.	1	0	4	Vehicle Maint.
393.55D1-B	Air Brake - ABS malfunction lamp defective on truck/bus manufactured on or after March 1, 1997 and each single unit CMV on or after March 1, 1998.	1	0	4	Vehicle Maint.
393.95A4-EEUS	Emergency Equipment - Fire Extinguishers - unsecured.	1	0	2	Vehicle Maint.
393.95(b)	Emergency Equipment - A power unit requiring fuses - missing a spare fuse for a required part or accessory (e.g., lamps required by 393.11, ABS lights or low air warning light).	1	0	2	Vehicle Maint.
393.9A-LIL	Lighting - Identification lamp(s) inoperative.	1	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.	1	0	2	Vehicle Maint.
393.9B-LRLIWR	Lighting - Tail lamp - Both lamps on rearmost vehicle inoperative when required to be on.	1	1	6	Vehicle Maint.
396.3A1-BALAC	Brake - Audible air leak from a brake chamber	1	0	4	Vehicle Maint.
396.3(a)1BOS	Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination.	2	2	0	Vehicle Maint.

Inspection History

Total Inspections: 21


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

11/18/2025	VA7601000132	VA	41705UA	VA	STRAIGHT TRUCK		3
11/6/2025	VA8301002645	VA	13785UA	VA	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.55C2-B Air Brake - CMV other than truck-tractor manufactured on or after March 1, 1998 not equipped with an antilock brake system. System does not function or indicates						4
10/8/2025	VA9262000060	VA	41729UA	VA	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.95(b) Emergency Equipment - A power unit requiring fuses - missing a spare fuse for a required part or accessory (e.g., lamps required by 393.11, ABS lights or low air						2
Vehicle Maint. Violation: 393.95A4-EEUS Emergency Equipment - Fire Extinguishers - unsecured						2
8/29/2025	VA5755000948	VA	13788UA	VA	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.9B-LRLIWR Lighting - Tail lamp - Both lamps on rearmost vehicle inoperative when required to be on (OOS)						6 + 2 (OOS)
Vehicle Maint. Violation: 393.9A-LSML Lighting - Side marker lamp(s) inoperative						2
Vehicle Maint. Violation: 393.9A-LLPL Lighting - License plate lamp inoperative						2
Vehicle Maint. Violation: 393.9A-LIL Lighting - Identification lamp(s) inoperative						2
8/20/2025	VA5755000930	VA	41722UA	VA	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.55D1-B Air Brake - ABS malfunction lamp defective on truck-tractor manufactured on or after March 1, 1997 and each single unit CMV on or after 1998.						4
7/22/2025	VA8031000686	VA	13784UA	VA	STRAIGHT TRUCK		3
6/5/2025	VA7901000113	VA	98601TA	VA	STRAIGHT TRUCK		2
4/21/2025	VA8031000551	VA	41724UA	VA	STRAIGHT TRUCK		2
3/3/2025	VA7901000091	VA	35418UA	VA	STRAIGHT TRUCK		2
3/3/2025	VA8031000525	VA	13789UA	VA	STRAIGHT TRUCK		2
Driver Fitness Violation: 391.11B5-LNCDLNVE License - Endorsement - Operate a CMV without proper endorsement or in violation of restriction. NOTE: Other than a 391.41 violation. (OOS)						8 + 2 (OOS)
2/28/2025	VA5639001157	VA	41707UA	VA	STRAIGHT TRUCK		2
Vehicle Maint. Violation: 396.3A1-BALAC Brake - Audible air leak from a brake chamber						4
Vehicle Maint. Violation: 393.47(e) Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt						4
Vehicle Maint. Violation: 393.53B-B Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear						4
Vehicle Maint. Violation: 393.55(c)(1) Truck Tractor manufactured on or after March 1, 1997 not equipped with an antilock brake system						4
Vehicle Maint. Violation: 396.3(a)1BOS Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination (OOS)						0 + 2 (OOS)
2/13/2025	VA8031000508	VA	20950UA	VA	STRAIGHT TRUCK		2
1/8/2025	VA7901000082	VA	98601TA	VA	STRAIGHT TRUCK		2
Driver Fitness Violation: 392.2-MCSR Medical (Certificate) - Operating a CMV while in violation of state medical certification regulations						1
11/26/2024	VA8031000456	VA	20950UA	VA	STRAIGHT TRUCK		1
11/13/2024	VA5755000509	VA	41712UA	VA	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 392.9A2-C Cargo - Vehicle components or dunnage not secured (OOS)						1 + 2 (OOS)
8/26/2024	VA5639000667	VA	40512UA	VA	STRAIGHT TRUCK		1
Driver Fitness Violation: 391.41B10-MC Medical (Certificate) - Operating a commercial vehicle without corrective lenses or hearing aid as indicated on the driver's medical certificate (OOS)						2 + 2 (OOS)
Vehicle Maint. Violation: 393.47(e) Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt						4
Vehicle Maint. Violation: 393.53B-B Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear						4
Vehicle Maint. Violation: 393.55(c)(1) Truck Tractor manufactured on or after March 1, 1997 not equipped with an antilock brake system						4
Vehicle Maint. Violation: 396.3(a)1BOS Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination (OOS)						0 + 2 (OOS)
Unsafe Driving Violation: 392.2-SLLS2 State/Local Laws - Speeding 6-10 miles per hour over the speed limit						4
6/4/2024	VA5639000460	VA	13796UA	VA	STRAIGHT TRUCK		1
Unsafe Driving Violation: 392.16-D Driver - Failed to use seat belt while operating a CMV						7
3/19/2024	VA7901000018	VA	95850TA	VA	STRAIGHT TRUCK		1
2/7/2024	VA5755000077	VA	43506UA	VA	STRAIGHT TRUCK		1
2/7/2024	VA5755000076	VA	26456UA	VA	STRAIGHT TRUCK		1
2/7/2024	VA5755000078	VA	41715UA	VA	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: 6


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)

11/4/2025	VA0253100158	VA	41728UA	VA	0	1	Yes	No	2	3	6
10/15/2025	VA0252880098	VA	41723UA	VA	0	1	Yes	No	2	3	6
9/18/2024	VA0242685177	VA	43506UA	VA	0	0	Yes	No	1	1	1
8/7/2024	VA0242255113	VA	20948UA	VA	0	0	Yes	No	1	1	1
7/24/2024	VA0242115357	VA	41721UA	VA	0	0	Yes	No	1	1	1
3/15/2024	VA0240765045	VA	41721UA	VA	0	1	Yes	No	2	1	2

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: 3/4/2020 (Non-Ratable Review)
Total Inspections: 21
- Total Inspections without Violations used in SMS: 11
- Total Inspections with Violations used in SMS: 10
Total Crashes* : 6

*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

Enforcement Cases

(Six years as of 01/24/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 2284804

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 12/26/2025, updated monthly)

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

Most Recent Investigation: 3/4/2020 (Non-Ratable Review)	Total Inspections: 21 Total inspections without violations used in SMS: 11 Total inspections with violations used in SMS: 10	Total Crashes: 6*
3/4/2020 (Non-Ratable Review)	# Insp. OOS Driver Inspections 21 9.5% Vehicle Inspections 8 50.0% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 3 Towaway Crashes 3

*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 12/26/2025, 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.

84.3 Average PU × Utilization Factor = 84.3 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.

84.3 Average Power Units = 84 Current Power Units + 84 Power Units 6 Months Ago + 85 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# 2284804 = 89% Straight trucks/other vehicles
Determine VMT per Average Power Unit
13,561 VMT per Average Power Unit = 1,143,658 VMT From Registration (MCS-150) ÷ 84.3 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/.