Department of Transportation
ADOT
Arizona • United States of America
The Arizona Department of Transportation (ADOT) manages over 6,900 miles of state highways, including major freight corridors such as I-10, I-17, I-19, I-40, and US-60. ADOT's Motor Vehicle Division handles commercial vehicle permitting and driver licensing, while its freight planning efforts reflect Arizona's position as a key gateway for US-Mexico trade. The department's AZ511 system provides real-time traffic and road condition information critical for commercial drivers, and its oversize/overweight permit system supports the construction and mining industries throughout the state.
| Official Website | https://azdot.gov/ |
|---|---|
| Data API | https://www.az511.com/ |
| Founded | 1974 |
| Headquarters | Phoenix |
Available Data
Social Media
- @ArizonaDOT — Arizona DOT
Arizona Trucking Regulations
Size & weight limits, OS/OW permits, and seasonal restrictions for commercial vehicles
Weight Limits
| Category | Limit |
|---|---|
| Max Gross Vehicle Weight | 80000 lbs |
| Single Axle | 20000 lbs |
| Tandem Axle | 34000 lbs |
Dimensional Limits
| Category | Limit |
|---|---|
| Max Height | 13.5 ft |
| Max Width | 8.5 ft |
| Max Length (Single Unit) | 40 ft |
| Max Length (Combination) | 65 ft |
OS/OW Permits
Seasonal Restrictions
No spring weight restrictions — Arizona's arid climate prevents frost-related road damage. Monsoon season (July through September) can cause flash flooding on desert routes and washes; carriers should monitor AZ511 for road closures during storm events.
Weigh Station Bypass
26¢/gal
Member
Special Exemptions
Notable Rules
Arizona is a critical I-10 and I-40 corridor connecting California to Texas and the Southeast. Extreme summer heat (115°F+ in Phoenix metro) can cause tire blowouts and engine overheating — plan fuel and rest stops accordingly. US-93 (Hoover Dam Bypass area) has bridge weight and height restrictions. ADOT operates ports of entry on all major Interstate border crossings from CA, NV, UT, NM.
Sources
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