Pursuant to Act 300 of the Public Acts of 1949, the Michigan Vehicle Code (MVC), transport permits are required for vehicles and loads that exceed the maximum legal limits established in the MVC. Transport permits are only issued for vehicles and loads which cannot reasonably be reduced in size or transported by other means. More detail regarding legal sizes and types of permits issued by MDOT can be viewed by linking to the informational guides below:

• Truck Drivers Guidebook
• Maximum Legal Truck Loadings and Dimensions (T-1)
• Movement of Oversize or Overweight Vehicles and Loads (T-2)
• Movement of Mobile Homes and Building Modules (T3)

Refer to these Online Resources:

• Maximum Legal Truck Loadings and Dimensions (T-1)
• Truck Drivers Guidebook

Maximum axle loadings depend on the size of the tires on the axle.

There are two different types of permits available to individuals or companies to transport their vehicles/loads on state trunklines: Single Trip Permits and/or Extended Permits.

Single trip permits may be issued for a five day period if so requested. A single trip permit is valid for one trip only, but may be issued to include a return move.

Extended permits may be issued on an annual basis and are issued based on the vehicle/load being transported, there are various categories of permits including construction, miscellaneous, agricultural, pipe and pole, and modular or mobile home.

For additional information see Information on the Movement of Oversize or Overweight Vehicles and Loads (T-2).