['Size and Weight Limits']
['Sizes and weights']
11/21/2024
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| Dimension | National Network | State and Other Supplemental Highways |
| Width: | 8' 6" | 8' |
| Height: | 13' 6" | 13' 6" |
| Length: | National Network | State and Other Supplemental Highways |
| Bus | 45' | 45' |
| Articulated bus | 65' | 65' |
| Straight Trucks | 40' | 40' |
| Straight truck and trailer | 65' | 59' |
| Tractor-semitrailer combinations | No limit with legal trailer | No limit with legal trailer |
| Semitrailer | 53' | 50' |
| Tractor-twin-trailer combination | 58' from front of first to back of last axle or 28' 6" each trailer | 59' |
| Trailers of twin-trailer combinations | 28' 6" | N/S |
| Boat-transporter combination | 65' | 65' |
| Overhang limitations | 3' front, 4' rear | 3' front, 4' rear |
| Stinger-steered boat-transporter | ||
| Overhang limitations | ||
| Auto-transporter | ||
| Overhang limitations | ||
| Stinger-steered auto-transporter | 80' | 80' |
| Overhang limitations | 4' front, 6' rear | 4' front, 6' rear |
| Saddlemount | 97' up to 3 | 55' up to 3 |
| General overhang limitations | 3' front, rear cannot cause vehicle to be over length | 3' front, rear cannot cause vehicle to be over length |
| Drawbar | 15' | 15' |
| Dromedary | ||
| Kingpin to rearaxle | ||
| Length special limitations or restrictions | ||
| Weight: | Interstate and Defense Highways | State and Other Supplemental Highways |
| Steer axle | ||
| Single axle | ||
| Tandem axle | ||
| Tridem axle | ||
| Gross vehicle weight | ||
| Load per inch width of tire | ||
| Per wheel | ||
| Tolerances | ||
| APU allowance | ||
| Natural gas allowance | 2,000 Includes battery powered | 2,000 Includes battery powered |
| Weight special limitations or restrictions | Michigan weight limits vary by season, axles, roadway. See state bridge formula. | |
Bridge rules
Bridge formula weights
Vehicles with a gross weight of 80,000 pounds or less and being operated on state highways may be eligible for increased weights using the Bridge Weight Formula.
Vehicles with a gross weight over 80,000 pounds or vehicles exceeding the gross weight set by the Bridge Formula are not eligible for the Bridge Weights. Exception: 5 axle tandem tandems.
Bridge formula would allow for the following weights:
| Single axle | 20,000 pounds |
| Tandem axles | 34,000 pounds - for the tandem axle group |
| The weight of other axle groups would be set by the Bridge Formula chart. To receive these weights the vehicle would have to strictly comply with the axle spacings as set forth in the formula: | |
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County and city weight limits
Allowable axle weights on local roadways must be consistent with state law, but final weight determinations are the responsibility of the local jurisdictions. The limitation of 700 lbs. per inch of tire width still applies. Contact the appropriate jurisdiction for specific information prior to movements upon local roadways.
['Size and Weight Limits']
['Sizes and weights']