Arizona State Route 80 Arizona State Route 80 State Route 80 (SR 80) is a roughly arc-shaped highway lying in southeastern Arizona that, with New Mexico's State Road 80, is a relic of the old U.S. Route 80, now truncated from San Diego to Dallas. This segment of old US 80 was not closely paralleled by Interstate 10, which lies to its north, and instead supplants the old and more direct (defunct in eastern Arizona) State Route 86. The route begins at an intersection with I-10 Bus. in Benson near an Amtrak station. The route heads south until it exits the city limit of
Arizona State Route 79 the current SR 79. On the afternoon of October 12, 1940, silent film actor Tom Mix died in a car accident on SR 79 (then part of U.S. Route 80) 18.5 miles southeast of Florence, Arizona. Business State Route 79 is a business loop in central Arizona. It lies entirely within the town limits of Florence located in Pinal County. The road begins south of town at its parent State Route 79 near the Central Arizona Project canal and travels northbound on Main St passing a "Y" junction with State Route 287 to Coolidge. The road continues northbound to an