US 93, one of Arizona’s Key Commerce Corridors, is the main route connecting Phoenix and Las Vegas, two of the fastest-growing metropolitan areas in the country. ADOT has been systematically improving US 93 between Phoenix and Las Vegas for over 20 years. While US 93 from I-40 (Kingman) to the Nevada state line has been fully improved to a four-lane divided highway, a handful of narrow, two-lane sections remain.