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 71 1936. Prior to 1934, the SR 71 designation was given to a road from US 180 near Safford to US 60 in Eagar. This previous incarnation of SR 71 had existed since 1927 and was part of the original state highway system introduced by the Arizona State Highway Commission on 9 September 1927. SR 71 was absorbed into SR 81 in 1934 and subsequently SR 81 became an extension of US 666 (now US 191). Arizona State Route 71 State Route 71 (or SR 71) is a state highway in central Arizona that stretches between its northeast terminus at its