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 181 Arizona State Route 181 State Route 181 (SR 181) is a highway in Cochise County, Arizona that runs from its junction with US 191 east of Pearce to the Chiricahua National Monument. It is an east–west route for the half east of Pearce, but becomes a primarily north–south route on the half approaching the monument. SR 181 serves primarily as an access to the monument, although it also services the settlement of Sunizona east of Pearce. The western terminus is located at US 191 east of Pearce. The highway heads east from this intersection through Sunizona where the highway briefly