 The Broadway subway plan was changed in 1915 to route both tracks into 60th Street and to cross the East River by a tunnel just north of the Queensboro Bridge.The 59th Street crossing was now useless, and at 60th Street, the subway would have to be at a lower grade on its way to the 60th Street Tunnel.The 59th Street crossing was converted into a pedestrian underpass for the IRT station, and is still in use for that purpose; its floor level is that of the never-completed BMT station.