['Size and Weight Limits']
['Sizes and weights']
03/11/2025
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| Dimension | National Network | State and Other Supplemental Highways |
| Width: | 8' 6" | 8' |
| Height: | 14' | 13' 6" |
| Length: | National Network | State and Other Supplemental Highways |
| Bus | 45' | 45' |
| Articulated bus | 60' | 60' |
| Straight Trucks | 40' | 40' |
| Straight truck and trailer | 65' | 65' |
| Tractor-semitrailer combinations | No limit | No limit |
| Semitrailer | 57' 6" | 53' or total length of 65' if semitrailer exceeds 53' |
| Tractor-twin-trailer combination | No limit | 65' |
| Trailers of twin-trailer combinations | 28' 6" | 28' 6" |
| Boat-transporter combination | ||
| Overhang limitations | ||
| Stinger-steered auto-transporter | ||
| Overhang limitations | ||
| Auto-transporter | ||
| Overhang limitations | ||
| Stinger-steered | 80' | 80' |
| Overhang limitations | 4' front, 6' rear | 4' front, 6' rear |
| Saddlemount | ||
| General overhang limitations | 3' front, 6' rear | 3' front, 6' rear |
| Drawbar | 15' | 15' |
| Dromedary | ||
| Kingpin to rearaxle | ||
| Length special limitations or restrictions | A vehicle transporter may transport cargo or general freight on a backhaul. A backhaul means the return trip of a vehicle transporter carrying cargo or general freight over all or part of the same route. | |
| Weight: | Interstate and Defense Highways | State and Other Supplemental Highways |
| Steer axle | 20,000 | 20,000 |
| Single axle | 20,000 | 20,000 |
| Tandem axle | 34,000 | 34,000 |
| Tridem axle | ||
| Gross vehicle weight | 80,000 Federal Bridge Formula | 80,000 Federal Bridge Formula |
| Load per inch width of tire | ||
| Per wheel | ||
| Tolerances | ||
| APU allowance | 550 | 550 |
| Natural gas allowance | 2,000 Includes battery powered or hydrogen fuel cell systems | 2,000 Includes battery powered or hydrogen fuel cell systems |
| Weight special limitations or restrictions | ||
['Size and Weight Limits']
['Sizes and weights']
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Copyright 2025 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.