47th–50th Streets–Rockefeller Center

47th–50th Streets–Rockefeller Center is an express station on the IND Sixth Avenue Line of the New York City Subway. It is served by the D and F trains at all times, and the B and M trains on weekdays.History47th–50th Streets–Rockefeller Center opened as part of the mainline portion of the IND Sixth Avenue Line to West Fourth Street–Washington Square, with connections to the IND Queens Boulevard Line to the north. Express service began in 1967 with the completion of express tracks between West Fourth and 34th Streets and the opening of the Chrystie Street Connection.Station layoutThe station has two island platforms and four tracks, like most express stations, but has an unusual track arrangement. The uptown side has the traditional arrangement of local service on the outside track and express service on the inside track, but the downtown side reverses this (local on the inside, express on the outside). This is to avoid level junctions with the IND Queens Boulevard Line, which is perpendicular with the IND Sixth Avenue Line north of this station. Express trains come from the Bronx via a connection from the IND Eighth Avenue Line while local trains come from Queens via either the IND 63rd Street Line or the 53rd Street Tunnels. South of this station, the downtown local track crosses under the express track and the line returns to the traditional arrangement in both directions at 42nd Street–Bryant Park.