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 1932 running through the Petrified Forest National Park east of Winslow between then U.S. Route 66 and U.S. Route 260. The road was decertified in 1951 and is now maintained by the National Park Service. SR 63 then appeared again on a state map in 1961 along a route from U.S. Route 66 in Sanders northwest 15 miles. In 1970, it extended north to then U.S. 164. The route disappeared on maps on May 11, 1981 when the route became U.S. Route 191 and US 164 became U.S. Route 160. State Route 65 was a state highway in northern Arizona