Description
The Concourse Line begins as a two-track line at Norwood β 205th Street. As it travels west, a center track forms which leads to the Concourse Yard. The line then curves south to the Grand Concourse, which it derives its name from since it runs underneath the roadway for most of its route. Two tracks from the Concourse Yard arrive between the two revenue tracks with switches and diamond crossovers between all four of them before the yard tracks merge is one to form the center track at Bedford Park Boulevard.
South of this station, the two outer tracks merge as one center express track while the center track splits in two and become the local tracks of the Concourse Line. The line then runs consistently to the south with diamond crossovers at Tremont Avenue. Due to the terrain, the vicinity of 174thβ175th Street station is uniquely built both underground and over 175th Street. Between 170th Street and 167th Street there are more switches and crossovers with a lay-up track adjacent to the Manhattan-bound local track.
The line curves west before 161st Street β Yankee Stadium and crosses the Harlem River into Manhattan via the Concourse Tunnel. There is one more stop, 155th Street, before the line curves south and joins the IND Eighth Avenue Line at the lower level of 145th Street.
Read more about this topic: IND Concourse Line
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