Pennsylvania State Route 980 runs north-south along the Washington-Allegheny County Line. PA St Rt 980 passes through the following towns in Washington County. McDonald Venice Canonsburg PA St Rt 980 is multi-plexed in Washington County. PA St Rt 980 crosses the following highways in Washington County. Pennsylvania State Rout 519, near Houston. Interstate 79, near Canonsburg. (NO INTERCHANGE) Pennsylvania State Route 50, at Venice. Pennsylvania State Route 50, at Venice. U.S. Rt. 22, near Santiago.
