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

Effective Thursday, May 10, 2018 at 6:00am, weight restrictions will be lifted on all state trunkline highways within the entire State of Michigan.

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


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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