High Quality Content by WIKIPEDIA articles! The Broad Street Line (BSL) (also known as the Broad Street Subway (BSS) or Orange Line) is a rapid transit line operated by the Southeastern Pennsylvania Transportation Authority that runs from Fern Rock Transportation Center in North Philadelphia, Pennsylvania to Pattison Avenue in South Philadelphia. The latter station provides access to the stadiums and arenas for the city's major professional sports teams, about a quarter mile away. It is named for Broad Street, the street under which it runs for almost its entire length. The line, which is entirely underground except for the northern terminus at Fern Rock, has four tracks in a local/express configuration from Fern Rock to Walnut-Locust and two tracks from Lombard-South to the southern terminus at Pattison (now known as AT T Station). The line and its trains are owned by the City of Philadelphia and were leased to SEPTA in 1968 after it assumed operation of the city transit systems....