M-23 (Michigan highway)

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This article describes a former Michigan state trunkline highway numbered M-23. For the U.S. Highway with the same number, see U.S. Route 23 in Michigan.

M-23 was an early designation (from the 1910s) for the east-west state highway route in the southern part of the U.S. state of Michigan that became US 112 when the US Highway system came into existence in the mid-1920s. It extended from the Michigan/Indiana state line just north of Elkhart, Indiana, going due north for about two miles and turned eastward. At Ypsilanti, Michigan it had its eastern terminus, meeting what was then M-17 (which would become U.S. Highway 12 from 1926 to 1961).

1 Route description
2 History
3 Major junctions
4 References

[edit] Route description

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At Ypsilanti, M-23 had its eastern terminus, meeting what was then M-17 (which would become US 12 from 1926 to 1961).

[edit] History

Most of M-23 became first US 112 and then what is now US 12 in southern Michigan. The designation became superfluous as the U.S. Highway system was introduced in Michigan, and the highway even crossed what would become US 23 in Saline. A bridge (now closed to vehicular traffic) west of Coldwater has a plaque indicating that the route that used that bridge was originally designated M-23. Michigan has not used markers for M-23 since the 1920s.