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Michigan Frost Laws, Seasonal Load Weight and Speed Restrictions – 2025

2025 Annual spring weight restrictions on state roads begin March 3, 2025, to protect Michigan's roads


Title: Spring Weight Restriction Bulletin #2

Date: 04/25/2025

Effective Monday, March 10, 20,25, at 6:00 a.m., weight restrictions will be imposed and enforced on all state trunkline highwayinor the entire state, including the Upper and Lower Peninsulas.

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 located 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 Ma, 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 weight-restricted areas.

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.

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