- The Michigan Department of Transportation (MDOT) is responsible for Michigan's 9,669-mile state highway system, comprised of all M, I, and US routes. MDOT also administers other state and federal transportation programs for aviation, intercity passenger services, rail freight, local public transit services, the Transportation Economic Development Fund (TEDF), and others.
Michigan Department of Transportation
State Transportation Building
425 W. Ottawa St.
P.O. Box 30050
Lansing, MI 48909