Michigan
- M-143, an unsigned highway in East Lansing
- M-144, the former highway connecting to the Michigan State Police Headquarters in East Lansing
- M-147, the former highway connecting to the State Prison of Southern Michigan outside of Jackson
- M-168, a former highway that connected to the former car ferry docks in Elberta
- M-209, formerly the shortest highway in the state connecting to a former Coast Guard station in Glen Haven in the Sleeping Bear Dunes National Lakeshore
- M-212, currently the shortest highway in the state connecting to Aloha State Park
- BS I-375, a section of Jefferson Avenue in Detroit that connects the southern end of I-375 to M-10
- M-554, a former spur route in Marquette that was never signed in its existence
Read more about this topic: List Of State Highways In The United States Shorter Than One Mile