Safety Measurement System - Complete SMS Profile (U.S. DOT# 506356)

CORBY ENERGY SERVICES INC

U.S. DOT#: 506356

Number of Vehicles: 164
Number of Drivers: 216
Number of Inspections: 19

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 August 28, 2026

On-Road Performance
0.41 Measure	Not Public	0.21 Measure	4.20 Measure	0 Measure	Not Public	0.03 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: 293.6 Segment: Straight Carrier	Not Public	Driver Inspections: 19 with HOS Compliance Violations: 1 Safety Event Group: 11-20 relevant driver inspections	Vehicle Inspections: 6 with Vehicle Maint. Violations: 2 Safety Event Group: 5-10 relevant vehicle inspections	Driver Inspections: 19 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 19 with Driver Fitness Violations: 1 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: 14


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.16-D	Driver - Failed to use seat belt while operating a CMV	2	0	7	Unsafe Driving
392.2LV	Lane Restriction violation	1	0	3	Unsafe Driving
392.2-SLLFC	State/Local Laws - Following too closely	1	0	5	Unsafe Driving
392.2-SLLILC	State/Local Laws - Improper lane change	1	0	5	Unsafe Driving
392.2-SLLLR	State/Local Laws - Lane restriction violation	2	0	3	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-SLLS4	State/Local Laws - Speeding 15 or more miles per hour over the speed limit	1	0	10	Unsafe Driving
395.8A1-HOSP	HOS (Property) - Failing to have a record of duty status using the method prescribed	1	1	5	HOS Compliance
391.45A-MCMC	Medical (Certificate) - Operating a CMV without being medically certified.	1	0	1	Driver Fitness
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.
393.95A1	Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.	1	0	2	Vehicle Maint.
393.9A-LRLI	Lighting - Tail lamp - Any inoperative	1	0	6	Vehicle Maint.

Inspection History

Total Inspections: 19


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

8/25/2026	MIPOWED06066	MI	PF15389	MI	STRAIGHT TRUCK		3
6/11/2026	MISCHMC05747	MI	PF15389	MI	STRAIGHT TRUCK		3
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
Unsafe Driving Violation: 392.2-SLLFC State/Local Laws - Following too closely						5
Unsafe Driving Violation: 392.2-SLLLR State/Local Laws - Lane restriction violation						3
Unsafe Driving Violation: 392.2-SLLILC State/Local Laws - Improper lane change						5
5/1/2026	MIBEAMW04836	MI	PF14716	MI	STRAIGHT TRUCK		3
Unsafe Driving Violation: 392.2-SLLLR State/Local Laws - Lane restriction violation						3
Unsafe Driving Violation: 392.2-SLLS2 State/Local Laws - Speeding 6-10 miles per hour over the speed limit						4
4/29/2026	MISHEPZ05636	MI	PF14827	MI	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.9A-LRLI Lighting - Tail lamp - Any inoperative						6
4/15/2026	MISHEPZ05612	MI	PF14764	MI	STRAIGHT TRUCK		3
Unsafe Driving Violation: 392.16-D Driver - Failed to use seat belt while operating a CMV						7
2/11/2026	MIDAWDD04373	MI	PF18580	MI	STRAIGHT TRUCK		2
11/19/2025	MICELMS01545	MI	PF19236	MI	STRAIGHT TRUCK		2
10/3/2025	MIWILLD03922	MI	RB63206	MI	TRUCK TRACTOR		2
10/2/2025	MIDELMT02265	MI	PF14870	MI	STRAIGHT TRUCK		2
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)
Vehicle Maint. Violation: 393.95A1 Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.						2
8/21/2025	MIHERLK02609	MI	PF14867	MI	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.16-D Driver - Failed to use seat belt while operating a CMV						7
7/11/2025	MISEYFE00103	MI	PF14780	MI	TRUCK TRACTOR		1
6/24/2025	MIBESSJ01182	MI	PF14808	MI	STRAIGHT TRUCK		1
6/4/2025	MIPATTM05062	MI	PF19230	MI	STRAIGHT TRUCK		1
5/30/2025	MICOPEK03227	MI	PF19237	MI	TRUCK TRACTOR		1
4/28/2025	MIROLLJ02743	MI	PF14870	MI	STRAIGHT TRUCK		1
HOS Compliance Violation: 395.8A1-HOSP HOS (Property) - Failing to have a record of duty status using the method prescribed (OOS)						5 + 2 (OOS)
2/21/2025	MIHARRK01470	MI	PF16554	MI	STRAIGHT TRUCK		1
11/1/2024	MIKAATZ00356	MI	PF16662	MI	STRAIGHT TRUCK		1
Driver Fitness Violation: 391.45A-MCMC Medical (Certificate) - Operating a CMV without being medically certified						1
10/22/2024	MIDAWDD03742	MI	PF14845	MI	STRAIGHT TRUCK		1
9/5/2024	MIHADZM04597	MI	PF18744	MI	STRAIGHT TRUCK		1
Unsafe Driving Violation: 392.2LV Lane Restriction violation						3

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: 11


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)

7/11/2026	MI0003873527	MI	PF18737	MI	0	0	Yes	No	1	3	3
6/16/2026	MI0003839325	MI	PF14878	MI	0	0	Yes	No	1	3	3
1/6/2026	MI0003706398	MI	PF15279	MI	0	1	Yes	No	2	2	4
10/7/2025	MI0003613901	MI	PF14765	MI	0	0	Yes	No	1	2	2
9/2/2025	MI0003587143	MI	RB63206	MI	0	1	Yes	No	2	2	4
7/8/2025	MI0003541106	MI	RB63206	MI	0	0	Yes	No	1	1	1
5/29/2025	MI0003519116	MI	PF20279	MI	0	0	Yes	No	1	1	1
3/24/2025	MI0003474138	MI	PF18583	MI	0	0	Yes	No	1	1	1
2/25/2025	MI0003441510	MI	DD32489	MI	0	0	Yes	No	1	1	1
11/4/2024	MI0003331383	MI	PF14757	MI	0	0	Yes	No	1	1	1
10/4/2024	MI0003300215	MI	PF14758	MI	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: 7/20/2022 (Non-Ratable Review)
Total Inspections: 19
- Total Inspections without Violations used in SMS: 10
- Total Inspections with Violations used in SMS: 9
Total Crashes* : 11

*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 09/11/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 506356

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 8/28/2026, updated monthly)

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

Most Recent Investigation: 7/20/2022 (Non-Ratable Review)	Total Inspections: 19 Total inspections without violations used in SMS: 10 Total inspections with violations used in SMS: 9	Total Crashes: 11*
7/20/2022 (Non-Ratable Review) 12/10/2014 (Non-Ratable Review) 10/22/2007 (Compliance Review)	# Insp. OOS Driver Inspections 19 5.3% Vehicle Inspections 6 16.7% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 2 Towaway Crashes 9

*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 8/28/2026, 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.

293.6 Average PU × Utilization Factor = 193.7 Average Power Units × 1.516 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.

193.7 Average Power Units = 164 Current Power Units + 207 Power Units 6 Months Ago + 210 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# 506356 = 96% Straight trucks/other vehicles
Determine VMT per Average Power Unit
30,320 VMT per Average Power Unit = 5,872,176 VMT From Registration (MCS-150) ÷ 193.7 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	1.516 = 30,320 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/.