State Route 78 (Arizona–New Mexico) State Route 78 (Arizona–New Mexico) Arizona State Route 78 (SR 78) and New Mexico State Road 78 (NM 78) are a pair of adjoining state highways located in eastern Arizona and western New Mexico linking U.S. Route 191 (US 191) and Arizona State Route 75 near Greenlee County Airport to US 180 northwest of Cliff, New Mexico. It is also known in its Arizona stretch as Mule Creek Road. The western terminus of SR 78 is located at a junction with US 191 and SR 75 at Three Way, Arizona near Greenlee County Airport. The highway heads northeast from this
Unconstructed state routes in Arizona the University of Arizona campus, and the industrial area between the railroad and I-10; an extension to Tucson International Airport. It first appeared on a Tucson map in 1971. Strong community opposition to freeways in Tucson was a major reason for cancellation of the project on April 16, 1982; the Tucson area has long been opposed to the rapid urban sprawl since. Future US Bicycle Routes in Arizona include USBR 66, 70, 79, and 90. Unconstructed state routes in Arizona Below is a list and summary of the unconstructed state highways in the U.S. state of Arizona. Some are currently