Effective 7 a.m. Friday, May 15, the Michigan Department of Transportation (MDOT) will lift the remaining seasonal weight restrictions on all state trunkline highways in the state of Michigan. State routes typically carry I, M or US designations.

Weight restrictions are implemented during the annual spring frost thaw period and are now completed for the 2026 season.

County road commissions and city public works departments put in place their own seasonal weight restrictions, which usually, but not always, coincide with state highway weight restrictions. Signs are generally posted to indicate which routes have weight restrictions in effect.

For weight restriction information and updates, call 800-787-8960 or you can access this information on MDOT's website at www.Michigan.gov/Truckers under "Restrictions." All-season routes are designated in green and gold on the MDOT Truck Operators Map. You also may sign up to receive email alerts.

_{Release courtesy of Michigan Department of Transportation.}