Two SEPTA commuter trains pass each other on the agency's Paoli/ Thorndale line, which is part of Amtrak's Keystone Corridor, a line that stretches from Pittsburgh, PA to Philadelphia. Built by t... (more)

Under the heart of downtown Philadelphia at Suburban Station, commuters board one of SEPTA's Silverliner IV's. This station, which was once a stub-end terminal of the PRR, now connects to the for... (more)