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 564 Arizona State Route 564 State Route 564, also known as SR 564, is a state highway in northern Arizona serving Navajo National Monument. This highway travels from U.S. Route 160 to Betatakin Ruin; SR 564 derives its number from the former route number of the adjacent stretch of US 160, U.S. Route 164. SR 564 ends at Betatakin; smaller roads travel beyond to Keet Seel. SR 564 is a highway in northern Arizona that connects the Navajo National Monument with US 160. The southern terminus is located at an intersection with US 160 and BIA Route 41, a road maintained