U.S. Route 66 in Arizona U.S. Route 66 in Arizona U.S. Route 66 (US 66, Route 66) covered as part of a former United States Numbered Highway in the state of Arizona. The highway ran from west to east, starting in Needles, California, through Kingman and Seligman to the New Mexico state line as part of the historic US 66 from Santa Monica, California, to Chicago, Illinois. The highway was decommissioned in 1985, although portions remain as State Route 66 (SR 66). In 1914 the road was designated National Old Trails Highway; in 1926 it was re-designated US 66 with the birth of the U.S.
Arizona State Route 71 1936. Prior to 1934, the SR 71 designation was given to a road from US 180 near Safford to US 60 in Eagar. This previous incarnation of SR 71 had existed since 1927 and was part of the original state highway system introduced by the Arizona State Highway Commission on 9 September 1927. SR 71 was absorbed into SR 81 in 1934 and subsequently SR 81 became an extension of US 666 (now US 191). Arizona State Route 71 State Route 71 (or SR 71) is a state highway in central Arizona that stretches between its northeast terminus at its