M-4 (Michigan highway)
From Wikipedia, the free encyclopedia
M-4, was formerly the designation of two different routes in the U.S. state of Michigan.
- M-4 (1939 Michigan highway) was the original designation of M-134 in Mackinac and Chippewa counties.
- M-4 (1987 Michigan highway) was the original designation of M-10/Northwestern Highway from I-696/US 24 to the northern terminus.
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