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
Former state routes in Arizona 1932 running through the Petrified Forest National Park east of Winslow between then U.S. Route 66 and U.S. Route 260. The road was decertified in 1951 and is now maintained by the National Park Service. SR 63 then appeared again on a state map in 1961 along a route from U.S. Route 66 in Sanders northwest 15 miles. In 1970, it extended north to then U.S. 164. The route disappeared on maps on May 11, 1981 when the route became U.S. Route 191 and US 164 became U.S. Route 160. State Route 65 was a state highway in northern Arizona