 Lexington Avenue−59th Street on the BMT Broadway Line has two tracks and one island platform, and two mezzanines.The Lexington Avenue mezzanine has two staircases to each of the IRT local platforms, an escalator to the downtown platform, and three staircases down to the center level.The Third Avenue side was constructed in the late 1960s, with the same red tile that was used during renovation of Bowling Green in 1978.