['Size and Weight Limits']
['Sizes and weights']
07/19/2024
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| Dimension | National Network | State and Other Supplemental Highways |
| Width: | 8' 6" | 8' |
| Height: | 13' 6" Auto-transporters 14' | 13' 6" Auto-transporters 14' |
| Length: | National Network | State and Other Supplemental Highways |
| Bus | ||
| Articulated bus | ||
| Straight Trucks | 45' | 45' May restricted to 26' 6" based on the strength, safety, and durability of the highway |
| Straight truck and trailer | 65' | 65' |
| Tractor-semitrailer combinations | No limit with legal trailer | 65' |
| Semitrailer | 53' | N/S |
| Tractor-twin-trailer combination | No limit | Not allowed |
| Trailers of twin-trailer combinations | 28' | N/S |
| 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 | ||
| Overhang limitations | ||
| Saddlemount | ||
| General overhang limitations | ||
| Drawbar | ||
| Dromedary | ||
| Kingpin to rearaxle | ||
| Length special limitations or restrictions | ||
| Weight: | Interstate and Defense Highways | State and Other Supplemental Highways |
| Steer axle | ||
| Single axle | 20,000 | 20,000 |
| Tandem axle | 34,000 | 34,000 |
| Tridem axle | 48,000 axles spaced 42" to 120" | 48,000 axles spaced 42" to 120" |
| Gross vehicle weight | 80,000 | 80,000 On Class AAA highways, 62,000 lb on Class AA highways, and 44,000 lb on Class A highways |
| Load per inch width of tire | 700 | 700 |
| Per wheel | ||
| Tolerances | N/S | 5% on axles and 10% on axles for certain agricultural products |
| APU allowance | ||
| Natural gas allowance | ||
| 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.