Initially conceived of as a spur routing, beginning at US-12 in Detroit and proceeding west-southwesterly across much of the Lower Peninsula before dipping into Indiana at Elkhart, where it terminated, US-112 later became a "loop" route rejoining its parent US-12 at New Buffalo. For many years, US-112 was the "other" Detroit-to-Chicago route, but when I-94 replaced the existing US-12, US-112 was decommissioned and its parent replaced it in its entirety. In the end, US-112 only existed for 36 years.
Overview In Development.
History In Development.
|The Detroit City Council approves the request made jointly by Grover C Dillman, State Highway Dept engineer, and John W Reid, commissioner of public works, to erect route markers on the various streets in downtown Detroit carrying the new U.S. Highway routes. US-112 is to be marked along Michigan Ave from the western limits of Detroit easterly into downtown, terminating at City Hall.|
- End of US highway 112 - from Dale Sanderson's excellent US Ends website.
- U.S. 12: Michigan to Washington - by the FHWA's Richard F. Weingroff, part of the administration's Infrastructure series of articles.
- Historic US-112/112S/Historic Indiana 112 - from the Indiana Ends website.
- US-112 - from another Indiana Highway Ends website.
- US-12 Route Listing