Michigan Highway 6 is a freeway serving as a southern bypass around Grand Rapids. It is the only single-digit state highway in Michigan that exists outside of Metro Detroit. The freeway was constructed mainly in the early 2000's, opening fully in 2004. As a full freeway, it's eligible to receive an Interstate number, but it doesn't have one (and that's okay). The western end is at Interstate 196 southwest of Grand Rapids, and the eastern end is at Interstate 96, on the southeast side of town. The highway is nearly 20 miles long, and in the middle of that twenty-mile stretch is an expansive cloverleaf interchange with the US Route 131 freeway.
My photo for Michigan Highway 6 is a "To" marker posted along Michigan Highway 37's southbound side, in Grand Rapids. This isn't a photo of M-6, per se, but I always try to find 24-inch route markers for the sake of consistency. A reassurance marker on the Michigan Highway 6 freeway itself would invariably be 36 inches, and pulling over on the side of the freeway itself isn't the safest option. Always be safe when routesnapping! Anyway, the sign assembly posted is a southbound reassurance marker on Michigan Highway 37 for vehicles leaving the intersection with 44th Street in southeastern Grand Rapids. The photo was taken in February 2019.