Longer combination vehicles - Michigan

Combination: Truck tractor and 2 trailing units—LCV

LENGTH OF CARGO–CARRYING UNITS: 58 feet

MAXIMUM ALLOWABLE GROSS WEIGHT: 164,000 pounds

OPERATIONAL CONDITIONS:

WEIGHT: The single–axle weight limit for LCV’s is 18,000 pounds for axles spaced 9 feet or more apart. For axles spaced more than 3.5 feet but less than 9 feet apart, the single–axle weight limit is 13,000 pounds. The tandem–axle weight limit is 16,000 pounds per axle for the first tandem and 13,000 pounds per axle for all other tandems. Axles spaced less than 3.5 feet apart are limited to 9,000 pounds per axle. Maximum load per inch width of tire is 700 pounds. Maximum gross weight is determined based on axle and axle group weight limits.

When restricted seasonal loadings are in effect, load per inch width of tire and maximum axle weights are reduced as follows: Rigid pavements — 525 pounds per inch of tire width, 25 percent axle weight reduction; Flexible pavements — 450 pounds per inch of tire width, 35 percent axle weight reduction.

DRIVER: The driver must have a commercial driver’s license with the appropriate endorsement.

VEHICLE: Truck height may not exceed 13.5 feet. There is no overall length for LCV’s operating on the Interstate System when semitrailer and trailer lengths do not exceed 28.5 feet. If either the trailer or semitrailer is longer than 28.5 feet, the distance from the front of the first box to the rear of the second box may not exceed 58 feet. A combination of vehicles shall not have more than 11 axles, and the ratio of gross weight to net horsepower delivered to the clutch shall not exceed 400 to 1.

PERMIT: Permits for divisible loads of more than 80,000 poundsmust conform to either Federal or grandfathered axle and bridge spacing requirements.

ACCESS: All designated State highways.

ROUTES: All Interstate routes and designated State highways.

LEGAL CITATIONS:

Michigan Public Act 300, section 257.722

Michigan Public Act 300, section 257.719

Combination: Truck-Trailer

LENGTH OF CARGO-CARRYING UNITS: 63 FEET

OPERATIONAL CONDITIONS:

WEIGHT: This combination must operate in compliance with State laws and regulations. Because it is not an LCV, it is not subject to the ISTEA freeze as it applies to maximum weight.

DRIVER: The driver must have a commercial driver’s license with appropriate endorsement.

VEHICLE: The overall length of this combination is limited to 70 feet. The only cargo that may be carried is saw logs, pulpwood, and tree length poles.

PERMIT: None required.

ACCESS: All NN routes.

ROUTES: All NN routes.

LEGAL CITATIONS:

Michigan Public Act 300, section 257.19