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
State highways deleted by the Utah State Legislature in 1969 1969 and immediately reassigned to old SR-2 (US-40) through Wendover. State Route 63A went from State Route 63/US-50 in Scipio to SR-1/I-15. This was deleted in 1969. State Route 64 - River Road from the Arizona state line north to SR-1 (US-91) in St. George - was added to the state highway system on May 12, 1931. It initially ran through St. George via 700 South, 700 East, 300 South, and 200 East, but was moved to use 700 East all the way to SR-1 (100 North) on January 25, 1963. After its deletion in 1969, the number was not