Safety Measurement System - Complete SMS Profile (U.S. DOT# 1608441)

MATHER BROS INC

U.S. DOT#: 1608441

Address: 132 S DOWNS STREET
RIDGECREST, CA 93555
Number of Vehicles: 55
Number of Drivers: 109
Number of Inspections: 35

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
1.77 Measure	Not Public	0 Measure	4.42 Measure	0 Measure	Not Public	0.01 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 8 Safety Event Group: 3-8 driver inspections with Unsafe Driving Violations Avg. PU × UF: 41.6 Segment: Combination Carrier	Not Public	Driver Inspections: 35 with HOS Compliance Violations: 0 Safety Event Group: 21-100 relevant driver inspections	Vehicle Inspections: 29 with Vehicle Maint. Violations: 17 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 35 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 35 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: 35


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.16B-DPASS	Driver - Failed to require passenger(s) (not a co-driver) to use seat belt while operating a property-carrying CMV.	1	0	7	Unsafe Driving
392.2C	Failure to obey traffic control device	1	0	5	Unsafe Driving
392.2-SLLS2	State/Local Laws - Speeding 6-10 miles per hour over the speed limit	1	0	4	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	4	0	5	Unsafe Driving
392.82(a)1	Using a hand-held mobile telephone while operating a CMV	1	0	10	Unsafe Driving
391.41(a)	Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency. History of either failing to produce a medical certificate or having an expired medical certificate.	1	0	1	Driver Fitness
393.11A1-CSLRR	Conspicuity Systems - Truck tractor, lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 1997	2	0	3	Vehicle Maint.
393.11A1-LSML	Lighting - Side marker lamp(s) missing	1	0	2	Vehicle Maint.
393.207A-SAPPAS	Suspension - Axle positioning part cracked/broken/loose/missing resulting in axle shift	1	1	7	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.
393.45A-BHTIJ	Air Brake - Improperly joined such as a splice made by sliding the hose ends over a piece of tubing and clamping the hose to the tube	1	1	4	Vehicle Maint.
393.45B2PC	Brake Hose or Tubing Chafing and/or Kinking - Connection to Power Unit	1	0	4	Vehicle Maint.
393.55(d)(3)	No or Defective ABS Malfunction Indicator for towed vehicles on vehicles manufactured after February 2001	2	0	4	Vehicle Maint.
393.55D3-B	Air Brake - ABS malfunction, trailers manufactured after March 1, 2001 unable to transmit ABS malfunction signal to towing vehicle.	1	0	4	Vehicle Maint.
393.55E-B	Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998	3	0	4	Vehicle Maint.
393.75(a)(3)	Tire-flat and/or audible air leak	1	1	8	Vehicle Maint.
393.75A3-ATIS	Tires - All others, leaking in tread area with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS	1	0	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.
393.75C-TAOTD-LT2/32	Tires - Less than 2/32 inch tread depth	1	0	8	Vehicle Maint.
393.78A-WS	Washers - Inoperative washing system.	1	0	1	Vehicle Maint.
393.95A4-EEUS	Emergency Equipment - Fire Extinguishers - unsecured	2	0	2	Vehicle Maint.
393.95(f)	Emergency Equipment - Stopped vehicle warning devices missing or improper	1	0	2	Vehicle Maint.
393.9A-LSLIWR	Lighting - Stop lamps - Both inoperative when required to be on	2	2	6	Vehicle Maint.
393.9A-LTSI	Lighting - Turn signal - Any inoperative on the rearmost vehicle.	1	0	6	Vehicle Maint.
396.17C-PI	Operating a CMV without documentation of a periodic inspection	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	1	1	0	Vehicle Maint.

Inspection History

Total Inspections: 35


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

4/29/2026	CANBEV007437	CA	9G85768	CA	TRUCK TRACTOR		3
4/15/2026	AZ7540002373	AZ	ZP63310	CA	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.78A-WS Washers - Inoperative washing system.						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
3/27/2026	CAUFEX002208	CA	9G42614	CA	TRUCK TRACTOR		3
2/6/2026	AZ7527000176	AZ	HLA3PR	AZ	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.11A1-CSLRR Conspicuity Systems - Truck tractor, lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 1997						3
Vehicle Maint. Violation: 393.55E-B Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998						4
2/3/2026	CAUECR000270	CA	ZP63310	CA	TRUCK TRACTOR		3
Unsafe Driving Violation: 392.2-SLLS2 State/Local Laws - Speeding 6-10 miles per hour over the speed limit						4
1/11/2026	CAUE2I009604	CA	ZP85765	CA	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.9A-LSLIWR Lighting - Stop lamps - Both inoperative when required to be on (OOS)						6 + 2 (OOS)
1/6/2026	NM0749Q06C7R	NM	ZP38758	CA	TRUCK TRACTOR		3
12/2/2025	NV7032029353	NV	3186585	IN	TRUCK TRACTOR		3
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: 393.75C-TAOTD-LT2/32 Tires - Less than 2/32 inch tread depth						8
Vehicle Maint. Violation: 393.75A3-ATIS Tires - All others, leaking in tread area with inflation more than 50% of the maximum inflation pressure on tire equipped with ATIS						8
11/18/2025	CAND74010870	CA	ZP63311	CA	TRUCK TRACTOR		3
11/17/2025	CAUE2I009461	CA	ZP63309	CA	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.55D3-B Air Brake - ABS malfunction, trailers manufactured after March 1, 2001 unable to transmit ABS malfunction signal to towing vehicle						4
11/13/2025	CAUCSG000407	CA	ZP38758	CA	TRUCK TRACTOR		2
8/19/2025	CANCEB008508	CA	9G65736	CA	TRUCK TRACTOR		2
8/1/2025	AZFL16330028	AZ	AJA1CN	AZ	TRUCK TRACTOR		2
7/21/2025	CANEBC002690	CA	Y129271	OR	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.95(f) Emergency Equipment - Stopped vehicle warning devices missing or improper						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
7/8/2025	AZXE14250180	AZ	Y132842	OR	STRAIGHT TRUCK		2
7/2/2025	CAUEZF000496	CA	9G80203	CA	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.207A-SAPPAS Suspension - Axle positioning part cracked/broken/loose/missing resulting in axle shift (OOS)						7 + 2 (OOS)
6/20/2025	AZFL14010031	AZ	JSA1LN	AZ	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.55E-B Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998						4
5/20/2025	CAUFWF003964	CA	3128614	IN	TRUCK TRACTOR		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
5/14/2025	AZ6898000115	AZ	ZP38758	CA	TRUCK TRACTOR		1
4/8/2025	CAUE2I008680	CA	Y129079	OR	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 393.95A4-EEUS Emergency Equipment - Fire Extinguishers - unsecured						2
3/4/2025	NV7078028675	NV	3523663	IN	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.9A-LTSI Lighting - Turn signal - Any inoperative on the rearmost vehicle.						6
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)
2/25/2025	CAND6B005980	CA	YP19728	CA	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.45A-BHTIJ Air Brake - Improperly joined such as a splice made by sliding the hose ends over a piece of tubing and clamping the hose to the tube (OOS)						4 + 2 (OOS)
2/21/2025	CAUEFG004303	CA	9G97234	CA	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
1/8/2025	CAUFRF000714	CA	9G84642	CA	TRUCK TRACTOR		1
11/19/2024	AZ7540001762	AZ	3133848	IN	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.9A-LSLIWR Lighting - Stop lamps - Both inoperative when required to be on (OOS)						6 + 2 (OOS)
Vehicle Maint. Violation: 393.55E-B Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998						4
9/16/2024	CAUDFY002393	CA	3354615	IN	STRAIGHT TRUCK		1
9/16/2024	CAUDFY002390	CA	3354615	IN	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 396.3(a)1BOS BRAKES OUT OF SERVICE: The number of defective brakes is equal to or greater than 20 percent of the service brakes on the vehicle or combination (OOS)						0 + 2 (OOS)
9/12/2024	CAUDFY002379	CA	YP19699	CA	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.55(d)(3) No or Defective ABS Malfunction Indicator for towed vehicles on vehicles manufactured after February 2001						4
9/11/2024	CAUFGN003386	CA	9G84645	CA	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.82(a)1 Using a hand-held mobile telephone while operating a CMV						10
9/3/2024	AZTM93430010	AZ	HTA9PR	AZ	TRUCK TRACTOR		1
Vehicle Maint. Violation: 396.17C-PI Operating a CMV without documentation of a periodic inspection						4
Vehicle Maint. Violation: 393.11A1-LSML Lighting - Side marker lamp(s) missing						2
Vehicle Maint. Violation: 393.11A1-CSLRR Conspicuity Systems - Truck tractor, lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 1997						3
Vehicle Maint. Violation: 393.95A4-EEUS Emergency Equipment - Fire Extinguishers - unsecured						2
8/27/2024	NV7078028189	NV	3186585	IN	TRUCK TRACTOR		1
Driver Fitness Violation: 391.41(a) Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency. History of either fail						1
Vehicle Maint. Violation: 393.75(a)(3) Tire-flat and/or audible air leak (OOS)						8 + 2 (OOS)
8/21/2024	CANECL002528	CA	Y129271	OR	STRAIGHT TRUCK		1
7/25/2024	NV7122028024	NV	3128614	IN	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2C Failure to obey traffic control device						5
7/24/2024	CAUE66000316	CA	9G80203	CA	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.45B2PC Brake Hose or Tubing Chafing and/or Kinking - Connection to Power Unit						4
Vehicle Maint. Violation: 393.55(d)(3) No or Defective ABS Malfunction Indicator for towed vehicles on vehicles manufactured after February 2001						4
7/11/2024	AZ1049800020	AZ	3133848	IN	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.16B-DPASS Driver - Failed to require passenger(s) (not a co-driver) to use seat belt while operating a property-carrying CMV.						7

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)

6/28/2025	CA0009791904	CA	9G85768	CA	0	1	Yes	No	2	2	4
3/27/2025	AZ0004300675	AZ	3356930	IN	0	0	Yes	No	1	1	1
10/8/2024	CA5402402219	CA	9G84632	CA	0	0	Yes	No	1	1	1
7/25/2024	NV0240701621	NV	3128614	IN	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:
Total Inspections: 35
- Total Inspections without Violations used in SMS: 12
- Total Inspections with Violations used in SMS: 23
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 06/12/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 1608441

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: None	Total Inspections: 35 Total inspections without violations used in SMS: 12 Total inspections with violations used in SMS: 23	Total Crashes: 4*
	# Insp. OOS Driver Inspections 35 0.0% Vehicle Inspections 29 27.6% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 1 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 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.

41.6 Average PU × Utilization Factor = 38.3 Average Power Units × 1.0848 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 = 55 Current Power Units + 30 Power Units 6 Months Ago + 30 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: Combo
Combination trucks/motor coach buses constituting 70% or more of the total PU
U.S. DOT# 1608441 = 100% Combination trucks/motor coach buses
Determine VMT per Average Power Unit
91,312 VMT per Average Power Unit = 3,500,000 VMT From Registration (MCS-150) ÷ 38.3 Average Power Units

Based on Step 1 and 2 calculate the Utilization Factor

Combo Segment
Meets Criteria	VMT per Avgerage PU	Utilization Factor
	< 80,000	1
	80,000 – 160,000	1.0848 = 1 + ( 91,312 VMT per PU − 80,000) ÷ 133,333
	160,000 – 200,000	1.6
	> 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/.