Effective at 9 a.m. Monday, April 4, 2016 weight restrictions will be lifted from southern Michigan border north to and including US-2 Iron Mountain to St. Ignace. Frost restrictions are still in effect for the remainder of the state and will be imposed and enforced on all state trunkline highways north of the US-2. State trunkline highways typically carry M, I, or US designations. 
Weight restriction information and updates may be obtained by calling 1-800-787-8960. For companies located in Canada or New Jersey, information may be obtained by calling 517-373-6256. – On routes designated as “All Season Routes” (green or gold on the MDOT Truck Operators Map) there will be no reduction in legal axle weight. – On routes designated as “Seasonal” (solid or dashed red on the MDOT Truck Operators Map) there will be a weight reduction of 25% for rigid pavements and 35% for flexible pavements.
Extended permits will be valid for oversize only in the weight restricted area. Single oversize load trip permits will not be issued for overweight loads or loads exceeding 14 feet in width, 11 axles and 150 feet in overall length in the weight restricted area. Detailed Weight Restriction information may be obtained by visiting www.michigan.gov/truckers. Please refer to the MDOT Truck Operator’s Map for route designations.
