Minnesota sits at the crossroads of Upper Midwest freight, with I-35 (the NAFTA corridor connecting Duluth/Superior to the Mexican border through the Twin Cities) and I-94 (Minneapolis–Saint Paul to Fargo and the North Dakota border) serving as the state's primary commercial arteries. The Minnesota Department of Transportation (MnDOT) oversees highway infrastructure and oversized/overweight permits. Driver and Vehicle Services (DVS), a division of the Department of Public Safety, administers IRP and IFTA credentials. Minnesota's freight profile is shaped by three dominant commodities: taconite iron ore from the Iron Range (northern Minnesota) moving south to steel mills, agricultural grain (corn, soybeans, wheat) from the southwestern farm belt, and timber and paper from the northern forests. Taconite hauling on Iron Range highways operates under special permit provisions that recognize the extreme weights involved. Minnesota enforces spring weight restrictions — known locally as frost laws — on non-Interstate state and county routes from approximately February through May, a critical consideration for agricultural and mining carriers. The state also allows longer-combination vehicles on designated Interstate corridors under Minnesota's LCV permit program.
| GVWR | 80,000 lbs federal interstate standard |
| Single axle | 20,000 lbs |
| Tandem axle | 34,000 lbs |
Minnesota follows federal weight limits on Interstates. Taconite-hauling routes on state highways in the Iron Range may allow higher gross weights under special commodity permits. Spring weight restrictions reduce allowable weights on non-Interstate routes seasonally.
State trucking association: Minnesota Trucking Association
Minnesota applies seasonal weight restrictions on non-Interstate state and county routes when spring thaw weakens the road base, typically from February through May. Posted restrictions reduce allowable gross vehicle weights on affected routes. MnDOT publishes route-specific postings online; carriers should verify restrictions before dispatching on state or county roads during the spring period, as they can change week to week.
Taconite iron ore carriers operating on Iron Range state highways (primarily in St. Louis, Itasca, and Koochiching counties) may apply for special commodity permits from MnDOT that allow gross weights above the standard limits. These permits are route-specific and require compliance with Minnesota's axle-weight and tire specifications. Contact MnDOT's Freight and Commercial Vehicle Operations office for current permit terms.
Yes. Minnesota allows LCVs — including twin 28.5-ft trailer combinations and Rocky Mountain doubles — on designated Interstate segments under an annual LCV permit issued by MnDOT. The permit specifies eligible routes, speed limits, and driver qualification requirements. LCVs are not permitted on non-Interstate routes without additional authorization.
Both IRP apportioned registration and IFTA fuel tax licensing are administered by Minnesota Driver and Vehicle Services (DVS), a division of the Department of Public Safety. Applications can be submitted through the DVS online portal or at regional DVS offices.