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 the Michigan Department of Transportation.

Permit services are recommended when a customer requiring a single trip permit is not able to take advantage of direct electronic submission. However, for a customer who only occasionally needs a permit, it may be most convenient to walk in to one of MDOT's Transportation Service Centers (TSC's). Or visit of the many privately owned Permit Services. For travel originating from outside Michigan, a permit is required for any vehicle or object beyond legal limits prior to entering the state of Michigan.