List of state trunkline highways in Michigan

State Trunkline Highway System
Highway markers from different years for former M-12 (1919), former M-7 (1926), former M-76 (1948), and current M-28
System information
Maintained by MDOT
Length5,976.147 mi (9,617.676 km)
Plus 14.775 mi (23.778 km) of special routes and 24.079 mi (38.751 km) of unsigned connectors
FormedMay 13, 1913, signed by July 1, 1919
Highway names
StateM-nn
Special Routes:
  • Alternate M-nn (Alt. M-nn or M-nnA)
  • Business M-nn (Bus. M-nn)
  • Bypass M-nn (Byp. M-nn)
  • Connector M-nn (Conn. M-nn)
  • Truck M-nn (Truck M-nn)
System links

The state trunkline highways in the US state of Michigan are the segments of the State Trunkline Highway System maintained by the Michigan Department of Transportation and numbered with the "M-" prefix officially.

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