At the 57th Street station, the line joins two express tracks that enter the station from the north via the BMT 63rd Street Line, which the Q uses (with rush hour service from the N and R). The line proceeds as a four-track subway down Seventh Avenue to its intersection with Broadway at Times Square-42nd Street, and then continues down Broadway to a point north of Canal Street, where the express tracks carrying the N and Q services descend and turn sharply east to separate platforms from the local tracks, before crossing the south side of the Manhattan Bridge to go to Brooklyn.