Here are two videos taken of Port Authority of Pittsburgh's T Light Rail System:
Video of Routes 42s & 47L:
http://www.youtube.com/watch?v=I9p6x6TGwRQ (http://www.youtube.com/watch?v=I9p6x6TGwRQ)
Ride Along on Route 42s between Downtown Pittsburgh & Beechview:
http://www.youtube.com/watch?v=so15UbgO2cM (http://www.youtube.com/watch?v=so15UbgO2cM)