Interstate 10 in Arizona 2013. The remainder of the old US 80 section was rebuilt to interstate standards, with completion in 2014. East of Tucson, I‑10 parallels and in some cases overlies old US 80 to Benson, and was originally co-signed as US 80 and SR 86. The section of I-10 from Valencia Road to Rita Road was the first construction project in the state of Arizona funded by the Federal Aid Highway Act of 1956. Construction began in 1957 and was completed in 1960. From Benson, the Interstate follows the Southern Pacific mainline east through Willcox and Bowie to New Mexico, rather than
Arizona State Route 64 Arizona State Route 64 State Route 64 (SR 64) is a state highway in the northern part of the U.S. state of Arizona. It travels from its western terminus in Williams to its intersection with U.S. Route 89 (US 89) in Cameron. SR 64 serves as the entrance road to the South Rim of Grand Canyon National Park; from Williams to Grand Canyon Village, the highway travels from the south to north, and from Grand Canyon Village to Cameron, it travels from the west to the east. While the road is technically not considered a state highway within national park