Interstate 40 in Arizona Interstate 40 in Arizona Interstate 40 (I-40) is an east–west Interstate Highway that has a section in the U.S. state of Arizona, connecting sections in California and New Mexico. The section throughout Arizona is also known as the Purple Heart Trail. It enters Arizona from the west at a crossing of the Colorado River southwest of Kingman. It travels eastward across the northern portion of the state connecting the cities of Kingman, Ash Fork, Williams, Flagstaff, Winslow, and Holbrook. I-40 continues into New Mexico, heading to Albuquerque. The highway has major junctions with U.S. Route 93 (US 93) — the
Arizona State Route 89 located at an interchange with Interstate 40 (I-40) in Ash Fork. This highway was a segment of US 89 between Ash Fork at I-40 and US 93 northwest of Wickenburg. All of US 89 was deleted south of its current southern terminus with Interstate 40 in Flagstaff after interstate highways offered shorter and more direct routes than the old long-distance US 89 in central and southern Arizona in 1992. Arizona State Route 89 State Route 89 (SR 89) is a state highway in the U.S. state of Arizona. It is part of the former route of U.S. Route 89 (US