Michigan Frost Laws, Seasonal Load Weight and Speed Restrictions – 2024

Title: Spring Weight Restriction Bulletin #4

Date: 05/01/2024

Effective 6 a.m. Monday, April 15, the Michigan Department of Transportation (MDOT) will lift seasonal weight restrictions on all state trunkline highways in the state. State routes typically carry M, I, or US designations.

State trunkline highways typically carry M, I, or US designations. Weight restriction information and updates may be obtained by calling 1-800-787-8960. For companies in Canada or New Jersey, information may be obtained by calling 517-335-0023.

- On routes designated as "All Season Routes" (green or gold on the MDOT Truck Operators Map), legal axle weight will not be reduced.

- On routes designated as "Seasonal" (solid or dashed red on the MDOT Truck Operators Map), there will be a weight reduction of 25% for rigid pavements and 35% for flexible pavements.

Extended permits will be valid for oversized vehicles only in the weight-restricted area.

Single-trip permits will not be issued for overweight loads or loads exceeding 14 feet in width, 11 axles, and 150 feet in overall length in the weight-restricted area.

Detailed Weight Restriction information may be obtained by clicking on www.michigan.gov/truckers.

Please refer to the MDOT Truck Operator's Map for route designations.

• 2024 Spring Weight Restriction Bulletins
• MDOT Truck Operators Map for route designations

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