This story has been corrected.
Service will be added on the Broad Street Line and Market-Frankford El on Saturday and Sunday to deal with crowds from the Made in America festival.
Regional Rail trains, meanwhile, will run on regular weekend schedules, with half-hour waits most of the time.
Extra trips will also be provided on some connecting transit services, including the Norristown High Speed Line and trolley routes.
Service on the Broad Street and Market-Frankford lines will run every five minutes before, during and after the performances. Trips will operate with similar frequency on trolley Routes 10, 11, 13, 34 and 36, all of which provide rides to and from Center City.