M-215 (Michigan highway)

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
Length:	5,976.147 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
Formed:	May 13, 1913, signed by July 1, 1919
Highway names
State:	M-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
Michigan State Trunkline Highway System Interstate US State Byways

The following is a list of the State Trunklines in the state of Michigan. All of them are numbered with the "M-" prefix officially.

Most of the following connectors are unsigned, but they were inventoried publicly as part of the 6th edition of the Michigan Geographic Framework in 2006. Up through the 7th edition, MDOT used a different numbering system, which was changed in May 2008 with the publication of the 8th edition. The years below note when each connector was established as an individual component of the highway system.