 A new section of highway was opened in 1973, rerouting M-66 and M-72 due west from their junction to US 131, bypassing a former routing north into Kalkaska.In 2008, M-72 within Alcona County was named the "Hazen Shirley 'Kiki' Cuyler Memorial Highway" in honor of the Michigan native and Hall of Fame baseball player.M-208 was a state trunkline highway in that served as a spur route from US 27 (current BL I-75) to the "Wakeley Bridge" in Crawford County in the 1930s.