Preview Preview: 15,813 carriers of roughly 4.5 million registered — a deliberate mix of currently active carriers and ones deactivated within the past year. Coverage is expanding. Sourced from the FMCSA Motor Carrier Census. Data as of 2026-09-08.

DUNCAN & SON LINES INC

USDOT 44035
MC docket MC-144606
Operating authority Active
USDOT registration Active
Safety rating Satisfactory rated 2010-10-13 — 15 years ago; last reviewed 2010-10-07 · roadside inspected 2026-09-03
Hazardous materials Yes

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Roadside inspections
Last inspected
2026-09-03
Inspections
597
last three years
Violations recorded
414

Out-of-service orders lower is better

Inspections ending with a vehicle or driver ordered out of service by authorities. Between 7 September 2024 and 7 September 2026.

Vehicle 12.9% below the national average of 22.26% 43 of 333 vehicle inspections ended in an out-of-service order
Driver 1.2% below the national average of 6.67% 5 of 423 driver inspections ended in an out-of-service order
Hazmat 0.0% below the national average of 4.44% 0 of 24 hazmat inspections ended in an out-of-service order

These rates use FMCSA’s own window and arithmetic, so they match this carrier’s FMCSA Company Snapshot. The national averages are the agency’s own, as of 31 July 2026.

Crashes
Last reported crash
2026-07-16
Crashes on file
144
Crashes with a fatality
7
Crashes with injuries
38
Crashes with a tow-away
142
Crashes on file, last 24 months
14
Crashes per million miles

Crash counts are permanent and reach back decades. A crash on this record is not a finding of fault.

Insurance and operating authority

Required and on-file BI&PD liability amounts, cargo and surety bond filings, and the operating authorities this carrier holds — from FMCSA's authority file, refreshed daily.

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How this carrier compares Premium

Where this carrier sits among the others

A chart of the out-of-service rate across every carrier in the group, with this carrier marked on it and the margin of error around its own rate.

Drawn against carriers with more than 500 inspections, carriers based in Arizona, carriers running 101 to 500 power units and every carrier on file.

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60 of this carrier’s 597 roadside inspections on FMCSA’s rolling three-year file ended in an out-of-service order. Comparison groups are CarrierHelm’s, built from FMCSA’s published inspection counts, fleet sizes and state of domicile across the carriers we hold — a systematic sample of the federal register, not all of it.

“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.” FAST Act §5223(d)(2)

Carrier details
Fleet and drivers
Power units
259
Trucks
259
Buses
0
Drivers
231
Drivers holding a CDL
231
What they run
Cargo authorised to carry
General freight; Metal: sheets, coils, rolls; Building materials; Machinery, large objects; Intermodal containers; Grain, feed, hay; Meat; Chemicals; Refrigerated food; Paper products; Construction; Other: SCRAP METAL
Operating range
Interstate, beyond 100 miles
Carrier operation
Interstate
Operation classification
AUTHORIZED FOR HIRE
Annual mileage reported
23,801,483
Mileage year
2025
Safety history
Safety rating date
2010-10-13
Last compliance review
2010-10-07
Review type
C compliance review
Registration
Entity type
CORPORATION
First on file
1974-06-01
Carrier last updated its record
2026-02-10
City
BUCKEYE
State
AZ
ZIP
85326

Every field on this page is published by the Federal Motor Carrier Safety Administration in its Motor Carrier Census, unedited. The agency’s record is the one that counts — correct it there and it corrects here on the next update. Data as of 2026-09-06 · The official FMCSA record · FMCSA safety profile · About this data