Business M-28 is a 4.8-mile (7.7 km) state trunkline highway in the U.S. state of Michigan serving as a business route for U.S. Highway 41 and M-28. It runs through the downtown districts of the historic iron-mining communities Ishpeming and Negaunee. The trunkline was originally a section of these roads until a northerly bypass was built in 1937. M-35 also ran through downtown ... Show More