High Quality Content by WIKIPEDIA articles! M-216 is a state trunkline highway in the US state of Michigan that serves as a connector route between M-40 at Marcellus and US Highway 131 (US 131). The highway runs through a rural area of the southwestern part of the state. It has been a part of the highway system since 1935; the current form of the roadway was finalized in 1939. Between 2,400 and 3,900 vehicles use the highway each day on average.