Arizona State Route 64 a route from Williams to the Grand Canyon. In 1935, the highway was extended to the east from the Grand Canyon to US 89. In 1961, the highway was extended further east from US 89 through Tuba City to the New Mexico state line. In 1965, the portion from Teec Nos Pos was renumbered to SR 504 to match New Mexico, which would be renumbered again in 1987 to US 64. In 1965, the section to the east of US 89 became US 164, and would later be renumbered to US 160 in 1969. Arizona State Route 64 State Route
Arizona State Route 93 approved a request from the Arizona Department of Transportation to eliminate all of US 89 south of Flagstaff. Thus, US 93 was extended to its current southern terminus at US 60 in Wickenburg. At its original northern terminus in Kingman, State Route 93 branched off of U.S. Route 66 (Andy Devine Avenue) at Louise Avenue, which is several miles east of where U.S. Route 93 and U.S. Route 466 branched northwest to Boulder City and Las Vegas. The old two-lane SR 93 headed east, south of and parallel to the new alignment of Interstate 40 until it came to the