Duncan & Son Lines Inc
USDOT 44035 · MC-144606 · Buckeye, Arizona · Interstate for-hire carrier · 250–499 power units
Duncan & Son Lines Inc is a corporation based in Buckeye, Arizona, registered with the FMCSA as an interstate carrier (authorized for hire). It reports 259 power units and 231 drivers, which ranks it #24 by fleet size among 134 active for-hire carriers with 50+ power units headquartered in Arizona. In the 24 months to Sep 24, 2026 its trucks were inspected 423 times – about 1.6 inspections per power unit. 12.7% of vehicle inspections and 1.2% of driver inspections ended with an out-of-service order, against 18.3% and 2.0% for carriers of the same size nationally. FMCSA records 14 reportable crashes in the last 24 months (4 injuries, 0 fatalities, 14 tow-away), or 5.4 per 100 power units versus 4.2 for its size band. Crash counts in FMCSA data do not indicate fault. Its registered cargo types are general freight, metal: sheets, coils, rolls, building materials, machinery, large objects, intermodal containers, grain, feed, hay, meat, chemicals and more.
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Registration and contact
| Legal name | Duncan & Son Lines Inc |
|---|---|
| DBA name | — |
| USDOT number | 44035 |
| Operating authority (docket) | MC-144606 |
| Entity type | Authorized for Hire |
| Operation | Interstate |
| Business type | Corporation |
| Physical address | 23860 W US Hwy 85, Buckeye, AZ 85326 |
| Phone | (623) 386-4511 |
| First registered | Jun 1, 1974 |
| Last MCS-150 update | Feb 10, 2026 |
| Hazmat carrier | Yes |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 44035.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 0 | 0 | 0 |
| Truck tractors | 0 | 259 | 0 |
| Trailers | 0 | 0 | 3,000 |
- 0.89 drivers per power unit (national median for 50+ unit fleets: 0.99).
- 11.6 trailers per tractor – a drop-and-hook style trailer pool.
- 23,801,483 miles reported for 2025 – about 91,898 miles per power unit vs a 41,335 median for 250–499-unit fleets.
- 0% of listed equipment is owned rather than leased.
- 231 CDL drivers; 211 drivers operate interstate beyond 100 miles, 20 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 250–499-unit for-hire carriers nationally (792) and Arizona carriers with 50+ units (134).
| Measure | Duncan & Son Lines Inc | Same size, US | AZ average | |
|---|---|---|---|---|
| Vehicle out-of-service rate | 12.7% | 18.3% | 18.8% | 31% lower than average |
| Driver out-of-service rate | 1.2% | 2.0% | 1.3% | 41% lower than average |
| Crashes per 100 power units | 5.4 | 4.2 | 4.5 | 30% higher than average |
| Inspections | 423 | 422 with a driver check, 331 with a vehicle check, 240 BASIC violations recorded, 25 hazmat-related | ||
| FMCSA safety rating | Satisfactory (rated Oct 13, 2010) | |||
Cargo carried
Less common in this directory: grain, feed, hay (851 of 5,000 carriers); intermodal containers (980 of 5,000 carriers).
Similar carriers in Arizona
Closest fleet size and cargo mix among Arizona carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Connect Transport LLC USDOT 3132101 | Phoenix | 198 | 99 | 380 | 31.2% | 12 |
| Rango Inc USDOT 2366726 | Mesa | 228 | 135 | 87 | 21.1% | 4 |
| MW Express Corp USDOT 3424382 | Phoenix | 108 | 110 | 230 | 17.0% | 7 |
| Otto Trucking Inc USDOT 488160 | Mesa | 215 | 135 | 87 | 48.8% | 9 |
| H K B Inc USDOT 902604 | Phoenix | 151 | 66 | 69 | 5.6% | 0 |
| Knight Refrigerated LLC USDOT 1252905 | Phoenix | 379 | 379 | 808 | 17.0% | 40 |
Other carriers near Buckeye
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Goldcoast Carriers Inc USDOT 3014047 | Buckeye | 325 | 330 | 72 | 24.3% | 2 |
| Hickman's Egg Ranch Inc USDOT 495506 | Buckeye | 78 | 41 | 19 | 25.0% | 3 |
| King Leo Transport LLC USDOT 3999994 | Avondale | 200 | 300 | 56 | 13.6% | 0 |
| White Mountain Trucking LLC USDOT 2356092 | Laveen | 127 | 115 | 323 | 25.6% | 12 |
| SMD Logistics Inc USDOT 1037092 | Somerton | 104 | 70 | 90 | 24.7% | 2 |
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FAQ
What is the USDOT number of Duncan & Son Lines Inc?
Duncan & Son Lines Inc is registered with USDOT number 44035 and operating authority MC-144606.
How many trucks does Duncan & Son Lines Inc have?
It reports 259 power units (259 tractors, 0 straight trucks) and 3,000 trailers, with 231 drivers, on its last MCS-150 update (Feb 10, 2026).
Where is Duncan & Son Lines Inc located?
Its registered physical address is in Buckeye, Arizona 85326.
What is the out-of-service rate of Duncan & Son Lines Inc?
Over 24 months, 12.7% of vehicle inspections and 1.2% of driver inspections resulted in an out-of-service order (same-size national average: 18.3% vehicle, 2.0% driver).
Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.