Beyond the ramps, as the line curves under the BMT Fourth Avenue Line, there are tracks that continue straight into the piers on the Sunset Park waterfront that were once operated by the South Brooklyn Railway. In the tunnel approaching 36th Street station, there is an unused trackway that was supposed to connect to the South Brooklyn Railway. The tunnel connection was never built. This trackway merges to the southbound track and runs for a long distance before ending at a wall.