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
Unconstructed state routes in Arizona the University of Arizona campus, and the industrial area between the railroad and I-10; an extension to Tucson International Airport. It first appeared on a Tucson map in 1971. Strong community opposition to freeways in Tucson was a major reason for cancellation of the project on April 16, 1982; the Tucson area has long been opposed to the rapid urban sprawl since. Future US Bicycle Routes in Arizona include USBR 66, 70, 79, and 90. Unconstructed state routes in Arizona Below is a list and summary of the unconstructed state highways in the U.S. state of Arizona. Some are currently