2020 Michigan winter frost/spring thaw laws and seasonal weight restrictions. See also:Tire chain laws. Tire chain laws by location. Trucking regulations. Federal bridge formula. Exemptions from seasonal restrictions. Page 1 of 11 By WLSADMIN on August 23, 2019 / Frost law restrictions. / Leave a commentTags: frost, laws, limit, maximum, Michigan, restrictions, seasonal, speed, trucking Previous PostIowa frost law restrictions. Next Post Minnesota frost law restrictions.