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
Former state routes in Arizona 1970 to 1992, SR 360 was assigned along the Superstition Freeway from Interstate 10 in Tempe through Mesa to U.S. Route 60 in Apache Junction. In 1992, US 60, which entered the Phoenix area on surface streets north of SR 360, was realigned onto the Superstition Freeway, replacing SR 360 in its entirety. State Route 364, also known as SR 364, was a state highway in the northeastern corner of the state of Arizona, starting in the town of Teec Nos Pos and ending at the state-line near the Four Corners. It first appeared on a state map in 1962