['Size and Weight Limits']
['Sizes and weights']
03/14/2025
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| Dimension | National Network | State and Other Supplemental Highways |
| Width: | 8' 6" | 8' 6" |
| Height: | 14' | 14' |
| Length: | National Network | On All Others |
| Bus | ||
| Articulated bus | ||
| Straight Trucks | 45' | 45' |
| Straight truck and trailer | 65' | 65' |
| Tractor-semitrailer combinations | No limit with legal trailer | No limit with legal trailer |
| Semitrailer | 53' | 53' |
| Tractor-twin-trailer combination | No limit if coupled trailers measure 61' or less | No limit if coupled trailers measure 61' or less |
| Trailers of twin-trailer combinations | 61' measured from front of first trailing unit to rear of second | 61' measured from front of first trailing unit to rear of second |
| Boat-transporter combination | ||
| Overhang limitations | ||
| Stinger-steered boat-transporter | ||
| Overhang limitations | ||
| Auto-transporter | 65' | 65' |
| Overhang limitations | 3' front, 4' rear | 3' front, 4' rear |
| Stinger-steered auto-transporter | 75' | 75' |
| Overhang limitations | 3' front, 4' rear | 3' front, 4' 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 | ||
| Weight: | Interstate and Defense Highways | On All Others |
| Steer axle | 20,000 or tire rating | 20,000 or tire rating |
| Single axle | 20,000 | 20,000 |
| Tandem axle | 34,000 | 34,000 |
| Tridem axle | ||
| Gross vehicle weight | 80,000 | 80,000 |
| Load per inch width of tire | 600 | 600 |
| Per wheel | 10,500 | 10,500 |
| Tolerances | ||
| APU allowance | ||
| Natural gas allowance | 2,000 | 2,000 |
| Weight special limitations or restrictions | An implement of husbandry is allowed a 2,000 lbs allowance off the interstate when hauling a raw agricultural commodity so long as the vehicle is not over the allowed gross weight. | |
Bridge rules
['Size and Weight Limits']
['Sizes and weights']
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