Safety Measurement System - Complete SMS Profile (U.S. DOT# 620266)

MAMMOTH UNIFIED SCHOOL DISTRICT

U.S. DOT#: 620266

Address: 461 SIERRA PARK ROAD
MAMMOTH LAKES, CA 93546
Number of Vehicles: 7
Number of Drivers: 7
Number of Inspections: 21

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 Passenger Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending July 31, 2026

On-Road Performance
0 Measure 0% Percentile	Not Public	0 Measure Less than 3 driver inspections	0.37 Measure Less than 5 vehicle inspections with violations	0 Measure 0% Percentile	Not Public	0 Measure Less than 5 driver inspections
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 0 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 7 Segment: Straight Carrier	Not Public	Driver Inspections: 0 with HOS Compliance Violations: 0 Safety Event Group: No Safety Event Grouping	Vehicle Inspections: 21 with Vehicle Maint. Violations: 4 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 0 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 0 with Driver Fitness Violations: 0 Safety Event Group: No Safety Event Grouping
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.

Carrier may be prioritized for an intervention action and roadside inspection. Denotes this carrier exceeds the FMCSA Intervention Threshold relative to its safety event grouping based upon roadside data and/or has been cited with one or more Acute/Critical Violations within the past 12 months during an investigation. Therefore, this carrier may be prioritized for an intervention action and roadside inspection.

Violation Summary

Violations: 4


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

393.83D-ELNGPB	Exhaust System - Other than Gasoline - Exhaust system leaking or discharging under the chassis more than 15 inches (38.1 cm) forward of the rear-most part of the bus or rear of opening doors or windows.	1	0	1	Vehicle Maint.
393.9	Inoperable Required Lamp	1	0	2	Vehicle Maint.
393.9A-LSLI	Lighting - Stop lamps - Any inoperative.	1	0	6	Vehicle Maint.
396.3(a)(1)	Inspection, repair and maintenance of parts and accessories	1	0	2	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)

7/22/2026	CANAF9000780	CA	1576862	CA	SCHOOL BUS		3
7/22/2026	CANAF9000777	CA	1699631	CA	SCHOOL BUS		3
7/22/2026	CANAF9000779	CA	1028234	CA	SCHOOL BUS		3
Vehicle Maint. Violation: 393.83D-ELNGPB Exhaust System - Other than Gasoline - Exhaust system leaking or discharging under the chassis more than 15 inches (38.1 cm) forward of the rear-most part of the						1
7/22/2026	CANAF9000781	CA	1028237	CA	SCHOOL BUS		3
7/22/2026	CANAF9000778	CA	1735149	CA	SCHOOL BUS		3
7/22/2026	CANAF9000775	CA	1630401	CA	SCHOOL BUS		3
7/22/2026	CANAF9000776	CA	1089648	CA	SCHOOL BUS		3
7/25/2025	CANCB1003257	CA	1089648	CA	SCHOOL BUS		1
7/25/2025	CANCB1003258	CA	1028237	CA	SCHOOL BUS		1
7/25/2025	CANCB1003259	CA	1028234	CA	SCHOOL BUS		1
7/25/2025	CANCB1003260	CA	1699631	CA	SCHOOL BUS		1
7/25/2025	CANCB1003261	CA	1576862	CA	SCHOOL BUS		1
7/25/2025	CANCB1003262	CA	1630401	CA	SCHOOL BUS		1
7/22/2025	CANCB1003246	CA	TEMP	CA	SCHOOL BUS		1
Vehicle Maint. Violation: 393.9A-LSLI Lighting - Stop lamps - Any inoperative.						6
11/14/2024	CANCB1002877	CA	1630401	CA	SCHOOL BUS		1
8/2/2024	CANCB1002713	CA	1576862	CA	SCHOOL BUS		1
8/2/2024	CANCB1002714	CA	1028237	CA	SCHOOL BUS		1
8/2/2024	CANCB1002715	CA	1028234	CA	SCHOOL BUS		1
Vehicle Maint. Violation: 393.9 Inoperable Required Lamp						2
8/2/2024	CANCB1002716	CA	1089648	CA	SCHOOL BUS		1
8/2/2024	CANCB1002717	CA	1630401	CA	SCHOOL BUS		1
Vehicle Maint. Violation: 396.3(a)(1) Inspection, repair and maintenance of parts and accessories						2
8/2/2024	CANCB1002718	CA	TEMP	CA	SCHOOL BUS		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: 0

This carrier has no crashes to display.

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: 21
- Total Inspections without Violations used in SMS: 17
- Total Inspections with Violations used in SMS: 4
Total Crashes* : 0

*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

Flags

Carrier Registration Details Subject to Passenger 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 08/24/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 620266

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 7/31/2026, 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: 21 Total inspections without violations used in SMS: 17 Total inspections with violations used in SMS: 4	Total Crashes: 0*
	# Insp. OOS Driver Inspections 0 0.0% Vehicle Inspections 21 0.0% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 0 Towaway Crashes 0

*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

Select a focus and file type to download SMS data.

Focus:
File Type:

Average PU × Utilization Factor (as of 7/31/2026, 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.

7 Average PU × Utilization Factor = 7 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.

7 Average Power Units = 7 Current Power Units + 7 Power Units 6 Months Ago + 7 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# 620266 = 100% Straight trucks/other vehicles
Determine VMT per Average Power Unit
3,714 VMT per Average Power Unit = 26,000 VMT From Registration (MCS-150) ÷ 7 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/.