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Minnesota Oversize/Overweight Permit (6-MN-a)

Information current as of 2020
In Minnesota, a person (developer) needs to obtain an Oversize or Overweight Permit (Permit) from the Minnesota Department of Transportation (MNDOT) if the developer’s vehicle exceeds the state’s size or weight restrictions. Generally, a developer needs a Permit if the developer’s vehicle exceeds:
  • 8 ½ feet in width;
  • 13 ½ feet in height;
  • 45 feet in length (single vehicles);
  • 75 feet in length (tractor and trailer); or
  • 80,000 pounds.
For complete vehicle size and weight restrictions in Minnesota, refer to Minn. Stat. §169.80-169.829 and the MNDOT Commercial Truck and Passenger Regulations Handbook.

Oversize/Overweight Permit Process

6-MN-a.1 – Check MNDOT Resources (Optional)

To expedite the permitting process, developers are encouraged to utilize the additional resources provided by MNDOT, when planning an oversize or overweight movement. The developer may check if there are any seasonal load limits in effect by visiting the MNDOT Seasonal Load Limits Webpage. A developer may also use the MNDOT Bridge Vertical Clearance Report and MNDOT Bridge Locator Tool to determine the height of bridges along specific routes.

6-MN-a.2 – Oversize/Overweight Permit Application

The developer must complete a Permit Application (Application), which can be found on the MNDOT Oversize/Overweight Permit System. The developer may submit the Application through the online permit system, by email, mail, or in person at the MNDOT central office in St. Paul. In order to expedite the permitting process, the developer should include the following information, if applicable:

  • The developer’s online permitting system account number;
  • The developer’s name, mailing address, and email address;
  • The starting date of the move;
  • A description of the load being moved;
  • Each vehicle’s make, license plate number, VIN, empty weight, and length;
  • The vehicle’s loaded dimensions, including any overhang;
  • If overweight, the gross vehicle weight, axle weights, axle spacing, number of tires per axle, and tire size; and
  • The start and end location of the proposed route.

MNDOT Commercial Truck and Passenger Regulations Handbook.

The developer may also choose to obtain a Permit from a third party permit service. MNDOT provides a list of permit service businesses.

If the developer’s vehicle exceeds 16 feet in height, 20 feet in width or 160 feet in length, the developer also must submit a Special Hauling Route Survey to MNDOT. This survey certifies that the developer conducted a pre-survey of the proposed route within 14 days of the proposed move to identify any obstructions. The Special Hauling Route Survey form can be found on the MNDOT Oversize/Overweight Permit System. MNDOT Commercial Truck and Passenger Regulations Handbook.

The developer must also submit a Permit fee with the Application. Permit fees can vary, but generally the fee is $15 for each single trip Permit. A complete list of Permit fees and calculations is found in Minn. Stat. §169.86(5). The developer must submit the appropriate fee before MNDOT issues a Permit.

6-MN-a.3 to 6-MN-a.4 – Review Application Materials for Completeness

After receiving an Application, MNDOT (or the appropriate third party permit service) reviews the Application for administrative and technical completeness. If the Application is incomplete, the developer should correct the deficiencies in the Application.

6-MN-a.5 to 6-MN-a.6 – Review Application for Approval

After determining the Application is complete, MNDOT reviews the Application to ensure that the movement complies with MNDOT’s rules and regulations. MNDOT may not issue the Permit if MNDOT finds that the movement may damage road foundations, surfaces or structures, or if the movement unduly endangers other drivers on the road.

6-MN-a.7 – Oversize/Overweight Permit

If MNDOT approves the Application, MNDOT issues a Permit to the developer. MNDOT may impose additional conditions or terms to the Permit. The developer must carry the Permit with the vehicle, when the movement is occurring. If the vehicle exceeds 9 feet in width or 75 feet in length, the developer must display eighteen-inch square red or orange flags from the vehicle. If the vehicle exceeds 12 ½ feet in width or 95 feet in length, the developer must display an oversize load sign with flashing amber lights and reflective letters visible from 500 feet on the vehicle. Additionally, the developer may need to arrange for escort cars for the movement. MNDOT Commercial Truck and Passenger Regulations Handbook.

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Contact Information

Edit Minnesota Department of Transportation
Heavy Hauling Project Senior (651) 355-0252