Historic US 80 in Arizona in Old Spanish Trail / U.S. 80 / U.S. 90 Posted September 5 · Report reply Historic 80 signs are also on what is now SR 80 from Benson down through Tombstone/Bisbee/Douglas and over to the NM border. Also in the Yuma area, if memory serves. Minor correction to the above post: The State Route from Florence Junction to Oracle Junction is 79, not 77. 77 picks up old 80/89 at Oracle Junction and continues into Tucson. The historic 80 signage continues to the Tucson city limits.