Minnesota Department of Transportation

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March 1, 2021

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Winter load increases end March 4 in central frost zone

ST. PAUL, Minn. — The Minnesota Department of Transportation will end winter load increases in the central frost zone starting at 12:01 a.m. Thursday, March 4.

MnDOT will start spring load restrictions (SLR) in the south, southeast and metro frost zones at the same time (12:01 a.m. Thursday, March 4). Spring load restrictions in the central frost zone start at 12:01 a.m. Friday, March 5. Finally, as announced in the Feb. 25 memo, winter load increases will end in the south, southeast and metro frost zones on Wednesday, March 3.

Frost zones can be found on the MnDOT load limits map.

Start and end dates and other load limit information are shown at mndot.gov/loadlimits.

Overweight permits for more than 80,000 pound gross vehicle weight will continue and new permits will be issued if all axle and group weights are legal.

Full-summer overweight permits can be issued, during the spring load restriction period, for travel on the interstate system only.

Middle-range overweight permits become available within each frost zone when spring load restrictions are lifted. Full-summer overweight permits become available two to three weeks after spring load restrictions are lifted.

Ending dates for spring load restrictions are variable and based on how weather is affecting roadway strength. 

For questions about over legal weight/size “heavy haul” trucking, call MnDOT’s Freight and Commercial Vehicle Operations - Oversize/Weight Permits, 651-296-6000 or email: ofcvopermits.dot@state.mn.us.

For questions about enforcement call the Minnesota Department of Public Safety - State Patrol - Commercial Vehicle Enforcement; 651-350-2000.

The start and end dates for winter load increases are based on how weather is affecting roadway strength. These dates are established by monitoring roadway strength as weather conditions change. The end date for winter load increases is variable and drivers should check for updates throughout the year.

All changes are made with a minimum three-day notice.

For the most current information, go to MnDOT’s automated 24-hour message center at 800-723-6543 for the U.S. and Canada, or 651-366-5400 for the Minneapolis/St. Paul area. This information is also published on the MnDOT seasonal load limits website at mndot.gov/loadlimits.