A seasonal load restriction sign posted on Carpenter Avenue just past Aurora, Wis., at the entry to Dickinson County. The county's Road Commission plans to lift all remaining restrictions countywide at 6 a.m. Friday. (Betsy Bloom/Daily News)

Remaining seasonal weight restrictions on all state trunkline highways in Michigan will be lifted effective 7 a.m. Friday, the Michigan Department of Transportation said.

State routes typically carry I, M or U.S. 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.

The Dickinson County Road Commission will be lifting all remaining restrictions countywide at 6 a.m. Friday.

Seasonal weight restrictions are put in place during the spring thaw to protect roads from damage.

For weight restriction information and updates, call 800-787-8960 or go to MDOT’s website at www.Michigan.gov/Truckers under “Restrictions.”