M-56 (1919–1957 Michigan highway)

Huron River to New Boston and Belleville

Huron River. On the north side of the river, M-56 followed the southernmost end of Fort Street to Huron River Drive, turning northwesterly along the latter road. The highway ran through an intersection with US 24A and parallel to the river into Flat Rock, where it terminated at the intersection with US 24/US 25 (Telegraph Road, now just US 24).^[3][5]

M-112 along the Willow Run Expressway (now I-94 and part of the Detroit Industrial Freeway) into Belleville north to US 112.^[9][10] In late 1954 or early 1955, the northern end was changed again, this time truncating the highway to end at New Boston.^[11][12] The northern end was shortened again to terminate at US 24/US 25 in Flat Rock in 1956.^[13][14] The remainder of the highway from Monroe to Flat Rock was removed and decommissioned from the state highway system the next year, becoming county roads under the jurisdiction of Monroe and Wayne counties.^[3][4]