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 to
New Mexico. 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) in Kingman, the main highway connecting
Phoenix and
Las Vegas, Nevada, and
I-17 in Flagstaff, the Interstate linking Phoenix and Flagstaff.