US Highway 112
US Highway 112 originally connected Detroit, MI with Elkhart, IN, starting in 1926, along with the rest of the original US Highways.
In 1932, it moved farther west, connecting Detroit with Rolling Prairie, IN. In 1936, its final routing was established, running between New Buffalo, MI and Detroit, thus remaining entirely within Michigan. The Indiana portion of the ex-US-112 was briefly known as US-112S.
|Michael Summa Simulated 112 Shield via USEnds
|Entire Sauk Trail- From Chicago’s highways, old and new, from Indian trail to motor road- 1923
In 1962, the freeway portion of US-12 became I-94, and US 12 was rerouted along the 112 route, eliminating that US Highway, as it existed wholly within the State of Michigan. 112's existence likely spared US-12 a similar fate as many other longer US Highways that were greatly truncated as a result of their freeway routes being replaced by Interstates.
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