Michigan Highway 100 is a short north-south route just west of Lansing, serving as the main north-south corridor through Grand Ledge, Michigan. The northern end is an interchange with Interstate 96 north of Grand Ledge. From there, Michigan Highway 100 simply skewers through Grand Ledge to end in Potterville. The southern end, in Potterville, is at Interstate 69.
My photo of Michigan Highway 100 depicts a southbound reassurance marker for those leaving the intersection at Michigan Highway 43 in Grand Ledge. This photo was taken on a detour off of Interstate 96 as I was trying to clinch that highway in July 2023.