Arizona State Route 78 begins at Threeway Junction near Clifton, and travels east to the New Mexico state line. The road was added to the state highway system in 1960.
| Distance sign to the State Line and Mule Creek, New
Mexico. In the background is AARoads guru Andy Field. 11/11/07 |
| SR 78 begins at Three Way, where the road meets
U.S. 191 and SR 75. 11/11/07 |
| Traffic to Safford should continue ahead on U.S. 191.
Traffic to Duncan should turn left on SR 75, or traffic
to Clifton should turn right on U.S. 191. 11/11/07 |
| This complicated sign assembly marks the end of Arizona
78 at Three Way Junction. 11/11/07 |