Port Authority of Allegheny County
Port Authority of Allegheny County (also known as the Port Authority or sometimes by its former nickname PAT) is the second-largest public transit agency in Pennsylvania and the 11th-largest in the United States. The Port Authority's bus and light rail system covers Allegheny County. On a few of its longer-distance routes, service extends into neighboring counties such as Beaver, Washington and Westmoreland counties. Those counties also have their own transit systems, including several routes that run into downtown Pittsburgh, where riders can make connections with Port Authority service.
This is a comprehensive guide to the vehicles currently in passenger service with PAT.