Safety Measurement System - Complete SMS Profile (U.S. DOT# 1671536)

CHAMBERS MOTORS INC

DBA: WM M CHAMBERS & SON

U.S. DOT#: 1671536

Address: 20610 SUSSEX HIGHWAY
SEAFORD, DE 19973
Number of Vehicles: 39
Number of Drivers: 26
Number of Inspections: 47

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
0.65 Measure	Not Public	0.16 Measure	2.95 Measure	0 Measure	Not Public	0.31 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 5 Safety Event Group: 5-8 driver inspections with Unsafe Driving Violations Avg. PU × UF: 66.1 Segment: Straight Carrier	Not Public	Driver Inspections: 46 with HOS Compliance Violations: 1 Safety Event Group: 21-100 relevant driver inspections	Vehicle Inspections: 37 with Vehicle Maint. Violations: 11 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 46 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 46 with Driver Fitness Violations: 1 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: 30


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
392.2-SLLS3	State/Local Laws - Speeding 11-14 miles per hour over the speed limit	2	0	7	Unsafe Driving
392.2-SLLS4	State/Local Laws - Speeding 15 or more miles per hour over the speed limit	1	0	10	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
395.8A1-HOSP	HOS (Property) - Failing to have a record of duty status using the method prescribed	1	1	5	HOS Compliance
383.23A2-LCDLN	License (CDL) - Operate a CMV and does not possess a valid CDL	1	1	8	Driver Fitness
391.41APC	Medical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency when medical certification is required.	1	1	1	Driver Fitness
393.104(b)	Damaged securement system/tiedowns	1	0	1	Vehicle Maint.
393.110(b)	Insufficient tiedowns to prevent forward movement for load not blocked by headerboard, bulkhead, or other cargo	1	1	3	Vehicle Maint.
393.43DBMA	Brake - Breakaway not attached to the towing vehicle	1	1	4	Vehicle Maint.
393.45B2-B	Air brake - Hose/tubing damaged or not secured	1	1	4	Vehicle Maint.
393.45B2PC	Brake Hose or Tubing Chafing and/or Kinking - Connection to Power Unit	1	1	4	Vehicle Maint.
393.47(e)	Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt	2	0	4	Vehicle Maint.
393.48A-BMBCBD	Drum Brake - Missing/broken component(s)	2	0	4	Vehicle Maint.
393.53(b)	CMV manufactured after 10/19/94 has an automatic airbrake adjustment system that fails to compensate for wear	1	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	1	0	4	Vehicle Maint.
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.	1	0	4	Vehicle Maint.
393.71H10-CDDSDNS	Coupling - Driveaway, safety devices not attached/not able to be secured	1	1	3	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	2	2	8	Vehicle Maint.
393.9A-LCL	Lighting - Clearance lamp(s) inoperative	1	0	2	Vehicle Maint.
393.9A-LHWS	Lighting - Hazard warning signal(s) inoperative	1	0	6	Vehicle Maint.
393.9A-LLPL	Lighting - License plate lamp inoperative	1	0	2	Vehicle Maint.
393.9A-LSLI	Lighting - Stop lamps - Any inoperative.	1	0	6	Vehicle Maint.
393.9A-LTSI	Lighting - Turn signal - Any inoperative on the rearmost vehicle.	1	1	6	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	1	1	0	Vehicle Maint.
396.5(b)	Oil and/or grease leak	1	0	3	Vehicle Maint.

Inspection History

Total Inspections: 47


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

5/14/2026	NJSPQJI02709	NJ	CL123987	DE	STRAIGHT TRUCK		3
4/20/2026	DE1125002842	DE	CL114903	DE	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.71H10-CDDSDNS Coupling - Driveaway, safety devices not attached/not able to be secured (OOS)						3 + 2 (OOS)
3/25/2026	DE1679001711	DE	CL116986	DE	TRUCK TRACTOR		3
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)
3/19/2026	MD2311C01902	MD	CL124125	DE	STRAIGHT TRUCK		3
2/26/2026	MD2454C00088	MD	CL124126	DE	TRUCK TRACTOR		3
2/4/2026	MD3211C00871	MD	CL121609	DE	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.9A-LLPL Lighting - License plate lamp inoperative						2
1/22/2026	MD3095C00576	MD	CL122360	DE	TRUCK TRACTOR		3
1/19/2026	MD0180C00696	MD	CL122059	DE	TRUCK TRACTOR		3
1/15/2026	MD0246C01046	MD	CL123987	DE	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.9A-LTSI Lighting - Turn signal - Any inoperative on the rearmost vehicle. (OOS)						6 + 2 (OOS)
Vehicle Maint. Violation: 393.9A-LSLI Lighting - Stop lamps - Any inoperative.						6
Vehicle Maint. Violation: 393.43DBMA Brake - Breakaway not attached to the towing vehicle (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.9A-LHWS Lighting - Hazard warning signal(s) inoperative						6
1/14/2026	MD3211C00817	MD	CL120467	DE	TRUCK TRACTOR		3
12/18/2025	VA1143500030	VA	CL122360	DE	TRUCK TRACTOR		3
12/17/2025	MD0302C00528	MD	CL124126	DE	TRUCK TRACTOR		3
12/17/2025	MD0251C00625	MD	CL123046	DE	STRAIGHT TRUCK		3
9/23/2025	PAC119001376	PA	CL122360	DE	TRUCK TRACTOR		2
9/11/2025	MD3247C00280	MD	CL120467	DE	TRUCK TRACTOR		2
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: 393.48A-BMBCBD Drum Brake - Missing/broken component(s)						4
9/5/2025	MD0325C00387	MD	CL123046	DE	STRAIGHT TRUCK		2
HOS Compliance Violation: 395.8A1-HOSP HOS (Property) - Failing to have a record of duty status using the method prescribed (OOS)						5 + 2 (OOS)
8/7/2025	MD0251C00361	MD	CL124125	DE	STRAIGHT TRUCK		2
7/25/2025	DE0400001475	DE	0000000	DE	STRAIGHT TRUCK		2
7/15/2025	VA4957003900	VA	CL123046	DE	STRAIGHT TRUCK		2
7/14/2025	MD3247C00194	MD	CL123131	DE	TRUCK TRACTOR		2
6/24/2025	MD2257C00187	MD	CL22771	DE	TRUCK TRACTOR		2
6/17/2025	MD2257C00166	MD	CL119557	DE	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)
Driver Fitness Violation: 391.41APC Medical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency (OOS)						1 + 2 (OOS)
5/29/2025	DE1279001911	DE	CL118072	DE	TRUCK TRACTOR		2
5/23/2025	MD3247C00080	MD	CL124126	DE	TRUCK TRACTOR		2
5/22/2025	MD2311C00760	MD	CL118778	DE	TRUCK TRACTOR		2
Unsafe Driving Violation: 392.2-SLLS3 State/Local Laws - Speeding 11-14 miles per hour over the speed limit						7
3/27/2025	DE1125001674	DE	CL109920	DE	TRUCK TRACTOR		1
3/14/2025	MD2311C00551	MD	CL122771	DE	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2-SLLS3 State/Local Laws - Speeding 11-14 miles per hour over the speed limit						7
3/10/2025	DE1679000766	DE	CL123131	DE	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
3/6/2025	MD3064005869	MD	CL123046	DE	STRAIGHT TRUCK		1
3/5/2025	VA8914000644	VA	CL123902	DE	TRUCK TRACTOR		1
2/19/2025	MD0180000802	MD	CL119557	DE	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.9A-LCL Lighting - Clearance lamp(s) inoperative						2
2/13/2025	MD2098C00309	MD	CL123987	DE	STRAIGHT TRUCK		1
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
12/18/2024	MD0251005968	MD	CL123046	DE	STRAIGHT TRUCK		1
12/18/2024	VA8754000618	VA	CL124126	DE	TRUCK TRACTOR		1
11/13/2024	MD0242005542	MD	CL109920	DE	TRUCK TRACTOR		1
11/7/2024	MD0249007378	MD	CL109920	DE	TRUCK TRACTOR		1
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
10/24/2024	MD0321000431	MD	CL121609	DE	TRUCK TRACTOR		1
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)
Vehicle Maint. Violation: 393.45B2-B Air Brake - Hose/tubing damaged or not secured (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.48A-BMBCBD Drum Brake - Missing/broken component(s)						4
Vehicle Maint. Violation: 393.47(e) Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt						4
Vehicle Maint. Violation: 393.53(b) CMV manufactured after 10/19/94 has an automatic airbrake adjustment system that fails to compensate for wear						4
9/25/2024	MD0293003986	MD	CL123987	DE	STRAIGHT TRUCK		1
9/23/2024	MD3247005761	MD	CL119557	DE	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.104(b) Damaged securement system/tiedowns						1
Vehicle Maint. Violation: 393.45B2PC Brake Hose or Tubing Chafing and/or Kinking - Connection to Power Unit (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.110(b) Insufficient tiedowns to prevent forward movement for load not blocked by headerboard, bulkhead, or other cargo (OOS)						3 + 2 (OOS)
9/3/2024	DE1528000800	DE	CL122059	DE	TRUCK TRACTOR		1
9/3/2024	MD3245005116	MD	CL118072	DE	TRUCK TRACTOR		1
8/30/2024	DE0398000759	DE	CL123131	DE	TRUCK TRACTOR		1
8/15/2024	DE1679000255	DE	CL119557	DE	TRUCK TRACTOR		1
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)
7/23/2024	PAK312420556	PA	CL123902	DE	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.16 Failing to use seat belt while operating a CMV						7
7/18/2024	MD2345001039	MD	CL122771	DE	TRUCK TRACTOR		1
Vehicle Maint. Violation: 396.5(b) Oil and/or grease leak						3
7/17/2024	VA4957003677	VA	CL119558	DE	TRUCK TRACTOR		1
7/3/2024	MD3247005569	MD	CL121609	DE	TRUCK TRACTOR		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)

2/13/2026	MD26A1339712	MD	CL123131	DE	0	2	No	No	2	3	6
8/4/2025	NY4090752200	NY	CL119298	DE	0	1	No	No	2	2	4
3/26/2025	VA0250875079	VA	CL119557	DE	0	0	Yes	No	1	1	1
2/4/2025	MD25S0005735	MD	CL122059	DE	0	0	Yes	No	1	1	1
7/16/2024	VA0242255247	VA	CL119115	DE	0	0	Yes	No	1	1	1
5/29/2024	NJ0024905369	NJ	CL121639	DE	0	0	Yes	No	1	1	1

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: 11/9/2022 (Non-Ratable Review)
Total Inspections: 47
- Total Inspections without Violations used in SMS: 29
- Total Inspections with Violations used in SMS: 18
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

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 06/25/2026 updated monthly from FMCSA )

Closed Date Case #
1/3/2023 DE-2023-0010-US1361

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 1671536

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: 11/9/2022 (Non-Ratable Review)	Total Inspections: 47 Total inspections without violations used in SMS: 29 Total inspections with violations used in SMS: 18	Total Crashes: 6*
11/9/2022 (Non-Ratable Review)	# Insp. OOS Driver Inspections 46 4.3% Vehicle Inspections 37 16.2% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 2 Towaway 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.

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.

66.1 Average PU × Utilization Factor = 38.3 Average Power Units × 1.7252 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.

38.3 Average Power Units = 39 Current Power Units + 39 Power Units 6 Months Ago + 37 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# 1671536 = 51% Straight trucks/other vehicles
Determine VMT per Average Power Unit
34,504 VMT per Average Power Unit = 1,322,539 VMT From Registration (MCS-150) ÷ 38.3 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	1.7252 = 34,504 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/.