PATCO CENTER Tower Moves To The Pherphery As the prototype for the "modern" heavy rail rapid transit system, Philadelphia's PATCO (Port Authority Transit Corporation) Hi-Speed Line ...

The Position Light: PATCO CENTER Tower Moves To The Pherphery position-light.blogspot.com/2026/01/patc... #InterlockingTower #PRSL #PatcoSpeedline

The Position Light: Lightweight Cab Signaling Resiliency position-light.blogspot.com/2014/06/lightweight-cab-... #PATCOSpeedline #cabsignaling #Rule241