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 180A Arizona State Route 180A State Route 180A (SR 180A) is a highway in Apache County, Arizona, that runs from its junction with US 180 to SR 61 west of St. Johns. It is an east–west route for the entirety of its length, though its true direction is more north–south. SR 180A follows the original alignment of US 180 before the more direct route from St. Johns to its current junction with SR 180A was built. It heads southeasterly from its western terminus at a junction with US 180 northwest of St. Johns. The eastern terminus of the highway is located