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 177 Arizona State Route 177 State Route 177 or SR 177 runs in a north–south direction from Superior, Arizona to Winkelman, Arizona. It ends at two junctions, US 60 to the north and State Route 77 to the south. The southern half of this road runs alongside the Gila River and the Copper Basin Railroad. The road passes through or near the towns of Kelvin, Riverside, Kearny and Hayden. This road passes by the copper mines in eastern Pinal County. It is a spur road of Arizona State Route 77. The southern terminus of SR 177 is located at an intersection