 When the state highway system was first signed in 1919, M-41 was designated between Holton and Hart.After the creation of the United States Numbered Highway System on November 11, 1926, and the designation of U.S. Highway 41 in the Upper Peninsula, the Michigan State Highway Department renumbered the state highways that had numbers that duplicated the then-new US Highways.In the process, the M-41 designation was decommissioned.