PHILADELPHIA - The first subway line in Philadelphia was the Market Frankford Line, which opened in 1895. The line initially ran from 69th Street to City Hall. Today, it serves a larger area of the city, including the downtown business district and the other regions with many pedestrians. It is free to use the subway, and trains are frequent and run on a schedule. The Broad Street Line and the Market Frankford Subway-Elevated are the city's two other lines.