Duncan & Son Lines INC Safety Record

DOT# 44035 · Buckeye, AZ 85326 · 6233864511

A

Excellent safety record — scored 5/100 (lower is better). This carrier has one of the best inspection records on file.

Last inspected 03/25/2026

Grade based on FMCSA inspection, crash, and violation data. See methodology →

Vehicle OOS Rate 0/30 pts
Driver OOS Rate 0/20 pts
Crash Rate 5/30 pts
Fatal Crash Penalty 0/20 pts

Lower scores are better. How is this calculated?

According to FMCSA records, Duncan & Son Lines INC (DOT# 44035) in Buckeye, Arizona has 554 inspections on record with 377 violations and a 11.4% vehicle out-of-service rate and 15 crashes. Safety grade: A (excellent safety record). Active common authority.

554 Inspections
11.4% Vehicle OOS Rate
15 Crashes
259 Power Units

An out-of-service (OOS) violation means a vehicle or driver was found unsafe to operate during a roadside inspection and was prohibited from continuing until the issue was corrected.

Vehicle OOS Rate 11.4%
Carrier: 11.4% (63 of 554) National: 23.2%
Driver OOS Rate 1.8%
Carrier: 1.8% (10 of 554) National: 6.4%
68% OOS rate better than 68% of carriers in Arizona
20% crash rate better than 20% of carriers in Arizona

FMCSA groups violations into Behavioral Analysis and Safety Improvement Categories (BASICs). Each violation found during a roadside inspection is classified into a category that reflects the type of safety risk.

377 total violations across 554 inspections
72 violations resulted in out-of-service orders (19%)
Vehicle Maintenance
164
Unsafe Driving
129
Hours of Service
75
Driver Fitness
6
Hazardous Materials
2
Other
1

FMCSA inspections range from Level 1 (full vehicle and driver examination) to Level 6 (enhanced motorcoach inspection). Level 1 is the most thorough; Levels 2 and 3 are walk-around and driver-only checks.

Inspected across 18 states
Level 1: 233 (42%) Level 2: 203 (37%) Level 3: 117 (21%) Level 4: 1 (0%)
Date State Level Veh OOS Drv OOS
03/25/2026 CA 2 0 0
03/23/2026 CA 3 0 0
03/23/2026 CA 1 0 0
03/23/2026 CA 2 0 0
03/18/2026 CA 2 0 0
03/18/2026 CA 2 1 0
03/18/2026 TX 2 0 0
03/13/2026 CA 3 0 0
03/11/2026 CA 1 0 0
03/10/2026 AZ 2 1 0
6 injury crashes
31-JAN-26 most recent crash on record
Date State Fatalities Injuries Tow-Aways
31-JAN-26 CA 0 1 0
27-DEC-24 CA 0 0 0
25-JUL-24 CA 0 1 0
23-AUG-25 AZ 0 1 0
18-JUN-24 AZ 0 0 0
18-AUG-24 CA 0 0 0
12-NOV-25 AZ 0 0 0
12-NOV-24 AZ 0 1 0
09-OCT-25 AZ 0 0 0
09-OCT-25 CA 0 1 0

FMCSA operating authority permits interstate for-hire transportation. Carriers must maintain minimum insurance coverage levels to keep authority active. BIPD (bodily injury and property damage) insurance is required for all for-hire carriers.

MC/MX Number MC144606
Common Authority Active
Contract Authority Active
Broker Authority Inactive
BIPD Insurance Not On File
Cargo Insurance Not On File
Surety Bond Not On File
Type Insurer Coverage Effective
BIPD/Primary National Interstate Insurance Company $1,000 09/15/2021

Power units include trucks, tractors, and other commercial motor vehicles registered to the carrier. Driver count reflects the total number of drivers reported on the carrier's MCS-150 filing.

Power Units 259
Drivers 231
Fleet Size Large Fleet
Operation Type Interstate
Hazmat Yes
Operating Since 06/01/1974
MCS-150 Filed 20260210 1
Annual Mileage (MCS-150) 23,801,483
Address 23860 W US Hwy 85, Buckeye, AZ 85326