 The section of M-65 concurrent with M-32 has been listed as a part of the National Highway System, a network of roads important to the country's economy, defense, and mobility.On July 1, 1919, the M-65 designation was used on two, discontinuous roads in the southern part of the Lower Peninsula.The southern segment ran from the Ohio state line north to the Dundee area in Monroe County; the northern section ran between Ann Arbor and Flint by way of Brighton and Fenton.