M-57 is an east–west state trunkline highway in the US state of Michigan. The highway connects US Highway 131 (US 131) near Rockford on the west end to M-15 near Otisville in the Lower Peninsula. In between, the mostly rural highway passes through farmland and connects several highways and smaller towns together. Three of these highways are freeways: US 131, US 127 and Interstate 75 (I-75). Along the way, between 3,700 and 22,300 vehicles use the highway daily. The current highway that bears the M-57 moniker is the second to do so. The first is now M-75 in the Northern Lower Peninsula. This second highway was designated in the 1930s along a different, but parallel, routing. The first major changes shifted that routing southward to the current corridor in stages. Through additional extensions and truncations, the modern routing was formed by the 1970s. Route description M-57 is a rural, two-lane highway crossing the south central Lower Peninsula. The western terminus is at US 131, north of Grand Rapids near Rockford in northern Kent County. East of the terminus is Rosie's Diner, which is the original shooting location for the Bounty Paper Towel commercials of the 1970s featuring Rosie the Waitress. The diner was moved from Little Ferry, New Jersey to its current location in 1990. From Rockford, M-57 runs east through rural farmland on 14 Mile Road into southern Montcalm County. East of the county line, the highway follows Carson City Road into the outskirts of Greenville. M-57 runs through a retail corridor before becoming Washington Street in town where it meets M-91. Washington Street crosses the Flat River and exits Greenville. Continuing eastward, the trunkline passes through more farmland on Carson City Road. It meets M-66 at a rural four-way intersection before passing into Carson City near the Gratiot county line. M-57 follows Cleveland Road, passing to the south of the communities of Middleton and Perrinton. Near Pompeii, M-57 meets US 127 at a folded diamond interchange along the expressway portion of the latter highway. Cleveland Road continues east running near Ashley and into Saginaw County. In between Ashley and the county line, the highway crosses a branch of the Great Lakes Central Railroad. M-57 follows Brady Road and crosses M-52 just west of Chesaning. Further east, the trunkline crosses another line of the Great Lakes Central. The highway follows Broad Street into town and over the Shiawassee River.