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
Former state routes in Arizona Former state routes in Arizona Below is a list and summary of the former state highways. State Route 62 was a state highway in northwestern Arizona running a total of from US 93, north of Kingman to the mining town of Chloride. The road first appeared on a 1936 map and it was deleted from the state highway system in 1971 because of the closure of the mine in Chloride. The road is still in use today as a county route. State Route 63 was a state highway in northeastern Arizona. The route first appeared on a state map in