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Michigan Frost Laws, Seasonal Load Weight and Speed Restrictions – 2019

As of April 26rd the last update was April 26rd

For the latest Spring Weight Restrictions updates, check 2019 Spring Weight Restriction Bulletins

Spring Weight Rules:

Michigan does not allow more than 11 axle trucks to enter or exit during Spring weight restrictions.

Michigan does not allow movements that exceed 14' in width during Spring weight restrictions.

Michigan may subtract 25-35% of the normal legal weight an axle group can haul on non interstate roads during Spring weight restrictions.

Michigan does not allow movements that are over legal weight on any group of axles during Spring weight restrictions.

Latest Update

Title: Spring Weight Restriction Bulletin #9 #9

Date: 04/29/2019

Effective Wednesday, May 1, 2019, 6 a.m., weight restrictions will be lifted on all state trunkline highways from the southern Michigan border north to and including US-2 from Iron Mountain to St. Ignace. Frost restrictions are still in effect for the remainder of the state and will be imposed and enforced on all state trunkline highways north of US-2 and M-185 on Mackinac Island. 

State trunk line 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 Map) there will be no reduction in legal axle weight. 

- 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 oversize 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 linking to www.michigan.gov/truckers. 

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


State trunkline highways typically carry M, I, or US designations.

Updates

Detailed Weight Restriction information may be obtained by linking to www.michigan.gov/truckers

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 517-373-6256.

For the most recent info, Please refer to the:

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