Frost Laws In Michigan 2025. State law mandates the institution of weight restrictions from march 1st to may 1st of every year, but the statute also allows the michigan department of transportation and the county road. Seasonal weight restrictions were enacted in order to help minimize the impact of heavy trucks on michigan’s roads during the spring cycle of freezing and thawing.
According to the county road association of michigan, while concrete and asphalt roads may look indestructible, they can actually be quite fragile in late winter as frost comes. The michigan department of transportation and local county.