Safety Measurement System - Complete SMS Profile (U.S. DOT# 4171230)

CORNERSTONE GRADING LLC

U.S. DOT#: 4171230

Address: 199 GREEN ROAD
ELLERBE, NC 28338
Number of Vehicles: 2
Number of Drivers: 2
Number of Inspections: 10

Safety Rating & OOS Rates AND Licensing and Insurance

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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 Measure	Not Public	0 Measure	2.66 Measure	0 Measure	Not Public	0.83 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 0 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 3.3 Segment: Straight Carrier	Not Public	Driver Inspections: 10 with HOS Compliance Violations: 0 Safety Event Group: 3-10 relevant driver inspections	Vehicle Inspections: 5 with Vehicle Maint. Violations: 2 Safety Event Group: 5-10 relevant vehicle inspections	Driver Inspections: 10 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 10 with Driver Fitness Violations: 1 Safety Event Group: 5-10 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: 3


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

383.23(a)(2)	Operating a CMV without a CDL	1	1	8	Driver Fitness
393.43	No/improper breakaway or emergency braking	1	1	4	Vehicle Maint.
393.75(a)(3)	Tire-flat and/or audible air leak	1	1	8	Vehicle Maint.

Inspection History

Total Inspections: 10


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

8/5/2025	NC0006783571	NC	ZB69697	NC	STRAIGHT TRUCK		2
6/3/2025	NC0006762748	NC	ZB69696	NC	STRAIGHT TRUCK		2
2/6/2025	NC0006725885	NC	ZB69697	NC	STRAIGHT TRUCK		1
1/21/2025	NC0006720472	NC	ZB69695	NC	TRUCK TRACTOR		1
1/9/2025	NC0006715663	NC	ZB68785	NC	STRAIGHT TRUCK		1
1/9/2025	NC0006716010	NC	ZB69696	NC	STRAIGHT TRUCK		1
Driver Fitness Violation: 383.23(a)(2) Operating a CMV without a CDL (OOS)						8 + 2 (OOS)
12/19/2024	NC0006710217	NC	ZB69697	NC	STRAIGHT TRUCK		1
Vehicle Maint. Violation: 393.75(a)(3) Tire-flat and/or audible air leak (OOS)						8 + 2 (OOS)
11/18/2024	NC0006701376	NC	ZB69695	NC	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.43 No/improper breakaway or emergency braking (OOS)						4 + 2 (OOS)
8/27/2024	NC0006680197	NC	ZB68785	NC	STRAIGHT TRUCK		1
6/20/2024	NC0006659674	NC	TD9146	NC	STRAIGHT TRUCK		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: 10
- Total Inspections without Violations used in SMS: 7
- Total Inspections with Violations used in SMS: 3
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

Enforcement Cases

(Six years as of 05/30/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 4171230

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: 10 Total inspections without violations used in SMS: 7 Total inspections with violations used in SMS: 3	Total Crashes: 0*
	# Insp. OOS Driver Inspections 10 10.0% Vehicle Inspections 5 40.0% 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

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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.

3.3 Average PU × Utilization Factor = 2 Average Power Units × 1.625 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.

2 Average Power Units = 2 Current Power Units + 2 Power Units 6 Months Ago + 2 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# 4171230 = 100% Straight trucks/other vehicles
Determine VMT per Average Power Unit
32,500 VMT per Average Power Unit = 65,000 VMT From Registration (MCS-150) ÷ 2 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	1.625 = 32,500 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/.