  m-100 is a northâsouth state trunkline highway in the central region of the u.s. state of michigan. it runs between potterville and grand ledge, connecting interstate 69 (i-69) and i-96 west of the state capital, lansing. the highway was previously a section of m-16. after m-16 was realigned, m-100 was created by 1927. three extensions in the 1930s, 1950s and 1990s resulted in the current highway routing. ==route description== m-100 starts at exit&nbsp;66 on i-69 in potterville. the highway runs north along hartel road, intersecting lansing road, the former route of us highway 27 (us&nbsp;27) south of downtown. hartel road runs due north from potterville to grand ledge. north of m-43 (saginaw highway), m-100 follows clinton street, jogging northwest along jefferson street north of willow highway. crossing the grand river on bridge street, m-100 returns to clinton street north of the river. north of town, the roadway is once again known as hartel road before changing to wright road near the abrams municipal airport. north of grand river highway, which is the former route of us&nbsp;16, m-100 meets i-96 and ends; wright road continues to the north of the interchange. like other state highways in michigan, m-100 is maintained by the michigan department of transportation (mdot). in 2011, the department's traffic surveys showed that on [
State_highways_in_Michigan Transportation_in_Clinton_County,_Michigan Transportation_in_Eaton_County,_Michigan