Former state routes in Arizona was a state highway in the eastern part of the state of Arizona, starting in the town of Nogales and ending at the New Mexico state line near Gallup on old U.S. Route 66 (presently Interstate 40). The route was cosigned with other routes, including U.S. Route 89 North from Nogales to Tucson, U.S. Route 80/U.S. Route 89 north from Tucson to U.S. Route 60 and U.S. Route 70 at Florence Junction, east on 60/70 to Globe and then 60 past Show Low to State Route 61, then east on 61 to U.S. 666 north of Springerville, where it overlapped
Interstate 10 in Arizona were laid out along railroad tracks, and US 60/US 70 was routed mostly parallel to the Santa Fe rail tracks east of Wickenburg, and the Arizona and California Railway west to Vicksburg. The two old federal routes then struck west across the desert and state line, picking up the Southern Pacific mainline at Indio, California, and I-10 overlies the old roads most of that distance. Moving east from the California line at Ehrenburg, I-10 follows the old route of US 60/US 70 for the first east from Blythe, California. In 1960, this western-most stretch of I-10 was built from near