The Michigan Department of Transportation and local agencies are enacting additional annual spring weight restrictions to protect roads.
Effective today, weight restrictions will be imposed and enforced on all state trunkline highways from the Michigan/Indiana and Michigan/Ohio state lines north to and including the Mackinac Bridge. State routes typically carry M, I, or US designations.
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.