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Winter truck load increases in effect for north frost zone

Dec 23, 2020 06:35AM ● By Editor

Photo: Chevin Fleet Solutions

From the Minnesota Department of Transportation - December 21, 2020

Winter load increases will begin Monday, Dec. 21, at 12:01 a.m. on unrestricted state highways in the north frost zone, according to the Minnesota Department of Transportation. Frost zones can be found on the MnDOT load limits map

Vehicles will be allowed to operate up to 10 percent over the standard legal maximum loads on unrestricted highways during the winter load increase period. However, trucks must comply with current registration weight laws and not exceed registered gross weight tolerances. 

Drivers need to check with local agencies before increasing any weights on city, county and township routes. 

A winter weight increase permit is required to take advantage of the 10 percent weight increase on interstate highways only; a permit is not required for state trunk highways. 

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: [email protected]

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

For updated road condition information, call 511 or visit

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