The Michigan Department of Transportation (MDOT) petitioned the American Association of State Highway and Transportation Officials in the mid-1980s to truncate US 10 to Bay City. The request was approved on October 11, 1985, and the signage was changed the next year. After the change, the Lodge Freeway was redesignated M-10. The non-freeway Northwestern Highway, until then designated M-4, was also renumbered as M-10. The southernmost portion of the Lodge Freeway was also initially redesignated as a portion of BS I-375 from I-75 south. By the next year however, the southern end of M-10 was moved to the corner of Jefferson and Randolph, placing all of the Lodge Freeway as part of M-10.