What is MC number 144606?

MC number 144606 is assigned to Duncan & Son Lines Inc, a registered motor carrier with the FMCSA under USDOT number 44035.

Is Duncan & Son Lines Inc Safe? DOT 44035 – Safety Rating, Crashes & Violations

Q: What is the safety rating of Duncan & Son Lines Inc?

Duncan & Son Lines Inc has a safety rating of "Satisfactory" as of October 13, 2010, based on the most recent FMCSA compliance review.

Q: How many inspections has Duncan & Son Lines Inc had?

Duncan & Son Lines Inc has recorded 364 total inspections, with 42 out-of-service orders.

This carrier is active with a Satisfactory safety rating.

Duncan & Son Lines Inc is a registered motor carrier with the FMCSA under USDOT number 44035. The company operates from Buckeye, AZ and maintains an active operating status with 259 power units and 231 drivers on record.

Safety Rating

FMCSA Safety Rating

✓ Satisfactory

Rated: October 13, 2010

Duncan & Son Lines Inc holds a "Satisfactory" safety rating from the Federal Motor Carrier Safety Administration (FMCSA). This rating indicates that the carrier has been found to comply with federal safety regulations based on the most recent compliance review conducted by FMCSA. View official FMCSA record →

Inspection Summary

All-time Inspections

All-time

364

Total

OOS

Driver OOS

Vehicle OOS

364 inspections indicates a high-volume, actively operating carrier.

OOS Rate11.54%

The out-of-service (OOS) rate represents the percentage of inspections that resulted in the carrier being placed out of service. 11.5% — approaching the national vehicle OOS average of ~21%.

Crash History

Crash Records

All-time

Total

Fatal

Injuries

Tow-Away

14 crashes reported. Review fatal and injury counts carefully alongside fleet size before engaging this carrier.

BASICS Safety Scores

BASICS Scores

Higher = more risk · FMCSA Behavior Analysis and Safety Improvement Categories

1.5

Unsafe Driving

Measures violations related to speeding, reckless driving, and improper lane changes.

0.4

HOS Compliance

Tracks hours-of-service violations, including driving beyond legal limits without rest.

0.0

Driver Fitness

Reflects issues with driver qualifications, licenses, and medical certifications.

0.0

Controlled Substances

Captures drug and alcohol violations, including failed or refused tests.

1.8

Vehicle Maintenance

Reflects brake, tire, lighting, and other equipment-related inspection violations.

Scores above 65 (general freight) or 50 (passenger/hazmat) trigger an FMCSA Alert. Higher scores indicate more safety risk. National median is approximately 20–30 for active carriers.

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Carrier Insight

Duncan & Son Lines Inc is a large motor carrier operating in Arizona. With 364 total inspections on record, the carrier has an out-of-service rate of 11.5%, which is below the national average of approximately 21%. 14 crashes have been reported. Review crash details alongside fleet size and inspection history before making hiring decisions.

A Satisfactory rating from the FMCSA indicates that Duncan & Son Lines Inc meets federal safety standards based on the most recent compliance review. This is the highest rating a carrier can receive.

The company operates 259 power units and employs 231 drivers. This fleet size places it among the larger carriers in the FMCSA registry.

Frequently Asked Questions

What is USDOT Number 44035?

USDOT number 44035 is assigned to Duncan & Son Lines Inc, an active motor carrier registered with the FMCSA, based in Buckeye, AZ.

What is the safety rating of Duncan & Son Lines Inc?

Duncan & Son Lines Inc has a safety rating of Satisfactory as of October 13, 2010.

How many inspections has Duncan & Son Lines Inc had?

Duncan & Son Lines Inc has recorded 364 total inspections with 42 out-of-service orders, representing an OOS rate of 11.54%.

Where is Duncan & Son Lines Inc located?

Duncan & Son Lines Inc is headquartered at 23860 W Us Hwy 85, Buckeye, AZ 85326.

What does "Not Rated" mean?

"Not Rated" means the FMCSA has not conducted a formal compliance review for this carrier. It does not indicate a safety problem — many active carriers operate without a formal rating.

Is zero crashes always a good sign?

Generally yes, but context matters. A carrier with zero crashes and very few inspections may simply have limited road exposure. Always review crash data alongside inspection volume and fleet size.

What is a normal OOS rate?

The national average vehicle out-of-service rate is approximately 21%. Driver OOS averages around 5%. Rates significantly above these thresholds may indicate recurring compliance issues.

How often is FMCSA data updated?

FMCSA publishes updated carrier data monthly. This page reflects the most recent available snapshot, updated on the date shown above.

What is the MC number for Duncan & Son Lines Inc?

The MC number for Duncan & Son Lines Inc is MC# 144606. The MC number is issued by the FMCSA and authorizes carriers to operate in interstate commerce.

Data sourced from the FMCSA Open Data Portal. Updated monthly. DOT# 44035 · Last updated: 2026-03-09. View official FMCSA record →

Duncan & Son Lines Inc (DOT# 44035 · MC# 144606) – FMCSA Carrier Profile