36th Street Station, also known as Sansom Common (36th Street) Station, is a subway station serving Routes 11, 13, 34, and 36 of the SEPTA Subway–Surface Trolley Lines. It is in the tunnel underneath the corner of Sansom Street and 36th Street. Sansom Street is a minor side street in between Chestnut Street and Walnut Street. It is on the campus of the University of Pennsylvania. Trolleys serving this station go eastbound to Center City Philadelphia and westbound to the Philadelphia neighborhoods of Eastwick and Angora and the Delaware County suburbs of Yeadon and Darby.