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
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