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 153 has peak hour traffic issues, it is still adequately handling most of the Sky Harbor Airport traffic that comes from the East Valley off Interstate 10 and US 60, thus proving that Route 153 had always been consistently under-utilized. As of Aug 2011, work is underway to widen SR 143 between the junction of I-10 and Sky Harbor Airport with new and expanded flyover ramps at the junction with I-10. Exit numbers were removed in 2007. Arizona State Route 153 State Route 153, also known as SR 153 and the Sky Harbor Expressway, is a former state highway in Maricopa