Safety Measurement System - Complete SMS Profile (U.S. DOT# 4228471)

N&B BOXWELL INC

DBA: ALL VALLEY DIESEL SERVICE

U.S. DOT#: 4228471

Address: 36 E RIDGE RD
SHERIDAN, WY 82801
Number of Vehicles: 8
Number of Drivers: 5
Number of Inspections: 30

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 June 26, 2026

On-Road Performance
0 Measure	Not Public	0 Measure	0 Measure	0 Measure	Not Public	0 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 0 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 8 Segment: Combination Carrier	Not Public	Driver Inspections: 18 with HOS Compliance Violations: 0 Safety Event Group: 11-20 relevant driver inspections	Vehicle Inspections: 28 with Vehicle Maint. Violations: 0 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 18 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 18 with Driver Fitness Violations: 0 Safety Event Group: 11-20 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: 0

This carrier has no violations to display.

Inspection History

Total Inspections: 30


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

12/5/2025	WYTJDC000920	WY	3302	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000921	WY	321282	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000922	WY	3378	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000923	WY	3303	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000924	WY	3381	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000925	WY	3612	WY	STRAIGHT TRUCK		2
12/5/2025	WYTJDC000926	WY	321281	WY	STRAIGHT TRUCK		2
6/25/2025	WYPAJH000443	WY	03T21282	WY	STRAIGHT TRUCK		1
6/25/2025	WYPAJH000444	WY	03C378	WY	STRAIGHT TRUCK		1
6/25/2025	WYXGTR000114	WY	03C612	WY	STRAIGHT TRUCK		1
6/25/2025	WYXGTR000115	WY	03C381	WY	STRAIGHT TRUCK		1
6/25/2025	WYPRKH000177	WY	03C303	WY	STRAIGHT TRUCK		1
6/25/2025	WYPRKH000178	WY	03C302	WY	STRAIGHT TRUCK		1
6/25/2025	WYPRKH000180	WY	03T21281	WY	STRAIGHT TRUCK		1
1/21/2025	CO1341482105	CO	03-T-21282	WY	STRAIGHT TRUCK		1
10/23/2024	WYPAJH000315	WY	03C609	WY	STRAIGHT TRUCK		1
10/23/2024	WYPZAM000292	WY	03C612	WY	STRAIGHT TRUCK		1
10/23/2024	WYPZAM000294	WY	03C620	WY	STRAIGHT TRUCK		1
10/22/2024	WYPZAM000291	WY	03C607	WY	STRAIGHT TRUCK		1
10/22/2024	WYPZAM000293	WY	03C605	WY	STRAIGHT TRUCK		1
10/22/2024	WYPAJH000313	WY	03T21282	WY	STRAIGHT TRUCK		1
10/22/2024	WYPAJH000314	WY	03T21281	WY	STRAIGHT TRUCK		1
7/25/2024	WYXGTR000007	WY	03T21281	WY	STRAIGHT TRUCK		1
7/25/2024	WYPRKH000134	WY	03T21282	WY	STRAIGHT TRUCK		1
7/25/2024	WYPRKH000135	WY	03C609	WY	STRAIGHT TRUCK		1
7/24/2024	WYTJDC000528	WY	3605	WY	STRAIGHT TRUCK		1
7/24/2024	WYTJDC000530	WY	3607	WY	STRAIGHT TRUCK		1
7/24/2024	WYTJDC000532	WY	3620	WY	STRAIGHT TRUCK		1
7/24/2024	WYTJDC000534	WY	3612	WY	STRAIGHT TRUCK		1
7/15/2024	WI2448000772	WI	03C638	WY	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: 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: 30
- Total Inspections without Violations used in SMS: 30
- Total Inspections with Violations used in SMS: 0
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

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 07/29/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 4228471

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 6/26/2026, 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: 30 Total inspections without violations used in SMS: 30 Total inspections with violations used in SMS: 0	Total Crashes: 0*
	# Insp. OOS Driver Inspections 18 0.0% Vehicle Inspections 28 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.

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Average PU × Utilization Factor (as of 6/26/2026, 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.

8 Average PU × Utilization Factor = 8 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.

8 Average Power Units = 8 Current Power Units + 8 Power Units 6 Months Ago + 8 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# 4228471 = 100% Combination trucks/motor coach buses
Determine VMT per Average Power Unit
6,250 VMT per Average Power Unit = 50,000 VMT From Registration (MCS-150) ÷ 8 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 + (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/.