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Arizona is highlighted. Select the other states on your route to compare their limits.
Legal dimensions
| Measure | Legal maximum |
|---|---|
| Width | 8' 6" |
| Height | 13' 6" |
| Length, semi-trailer | 57' 6" |
| Length, single vehicle | 40' |
| Length, overall | 65' |
| Front overhang | 3' |
| Rear overhang | 6' |
Legal weights
| Measure | Legal maximum |
|---|---|
| Gross vehicle weight | 80,000 lbs |
| Gross weight, single vehicle | — |
| Single axle | 20,000 lbs |
| Tandem axle | 34,000 lbs |
| Tridem axle | 42,000 lbs |
| Single axle, non-divisible | — |
| Tandem axle, non-divisible | — |
| Tridem axle, non-divisible | — |
Last checked September 2026. States revise legal limits, and a limit can depend on the road, the axle spacing or the configuration in ways one table cannot capture. Arizona is the authority — use this to plan, and confirm anything you are close to.
Arizona permit offices
Oversize/ Overweight/ Temporary Trip/ Fuel
Oversize / Overweight
- Phone
- (602) 771-2960
- Weekdays
- 8:00 AM – 5:00 PM