The sections of the route of US 31 in Michigan has been dedicated several times to various organizations. The route of US 33 in the state, which at the time was concurrent with US 31, was dedicated as the Blue & Gray Trail in 1938 to honor veterans of the American Civil War. The Blue Star Memorial Highway designation was applied to the highway to honor those serving in the military. The designation was dedicated on October 10, 1948, by the State Highway Commissioner Charles Ziegler.