 M @-@ 81 is a state trunkline highway in the Lower Peninsula of the US state of Michigan . The trunkline travels from the city of Saginaw at the junction with M @-@ 13 to the junction with M @-@ 53 east of Cass City over the county line in <unk> Township in northwestern <unk> County in The <unk> area of the state . Outside of the cities and villages along its route , M @-@ 81 passes through mostly rural farm country . Near Saginaw it intersects the freeway that carries both Interstate 75 ( I @-@ 75 ) and US Highway 23 ( US 23 ) in an industrial area . 
