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 277 Arizona State Route 277 State Route 277 (SR 277) is a highway in Navajo County, Arizona, that runs from its junction with SR 260 in Heber-Overgaard to its junction with SR 377 in Snowflake. It is an east–west route. SR 277 is a highway that provides a direct route connecting Heber-Overgaard and Snowflake. It does not pass through any other cities or towns. The western terminus is located at an intersection with SR 260 east of Heber-Overgaard. The highway heads northeast from this intersection and curves towards the east prior to an intersection with SR 377, which heads northeast to