 The highway dates back to the 1930s in Michigan . At the time it was extended into the state , it replaced sections of M @-@ 26 and M @-@ 35 . An eight @-@ mile ( 13 km ) segment was significantly reconstructed in the late 1950s , and an alignment change in the 1970s moved the routing of US 45 near Rockland before it was reversed soon afterwards . A segment of roadway that formerly carried US 45 is the site of the Paulding Light , a local phenomenon whose origins were scientifically described in 2010 . 
