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 153 has peak hour traffic issues, it is still adequately handling most of the Sky Harbor Airport traffic that comes from the East Valley off Interstate 10 and US 60, thus proving that Route 153 had always been consistently under-utilized. As of Aug 2011, work is underway to widen SR 143 between the junction of I-10 and Sky Harbor Airport with new and expanded flyover ramps at the junction with I-10. Exit numbers were removed in 2007. Arizona State Route 153 State Route 153, also known as SR 153 and the Sky Harbor Expressway, is a former state highway in Maricopa