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M-4, was formerly the designation of two different routes in the US state of Michigan.
- M-4 (1936–1939 Michigan highway) was the original designation of M-134 in Mackinac and Chippewa counties.
- M-4 (1979–1986 Michigan highway) was the original designation of M-10 (Northwestern Highway) from I-696/US 24 to the northern terminus.
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This article includes a list of roads, streets, highways, or other routes that are associated with the same title.
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| Browse numbered routes | ||||
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←  M-3 | MI | →  M-5 | ||