BETHEL PARK, Pa. — (WPXI) – Part of the Silver Line is not running because of downed power lines. PRT says shuttle buses are operating between Washington Junction and Library Station. Rail cars are operating between Mesta to Library Station on the Silver Line. PRT was not immediately sure why the lines came down just south of Washington Junction over Milford Drive, but said crews are working to repair lines and restore service as quickly as possible. A PRT spokesperson confirms this incident did not cause any cars to derail or any injuries to riders.