Michigan Highway 117 is a straight north-south route, approximately a quarter of the way westward along the Upper Peninsula. As the eastern half of the Upper Peninsula has two major east-west highways, Michigan Highway 117 provides a handy link between those two routes. Those two routes are found at the two endpoints of Michigan Highway 117: the northern end at Michigan Highway 28, and the southern end at US Route 2. The northern end is southwest of Newberry, and the southern end is just south of Engadine, a tiny unincorporated town through which Michigan Highway 117 passes.
My photo of a Michigan Highway 117 marker comes from the junction with Michigan Highway 28, at the north end. The signage depicted informs westbound travelers on Michigan Highway 28 that the left turn onto Michigan Highway 117 is just ahead. This photo comes from the August 2020 trip to Pictured Rocks, Tahquamenon Falls, Mackinac Island, and Traverse City. (I was in between the first two destinations.)