Sea Beach Railroad

BMT Sea Beach Line
The N train serves the entire BMT Sea Beach Line at all times, supplemented by a few peak-direction W trains during rush hours.
Overview
Type	Rapid transit
System	New York City Subway
Termini	Eighth Avenue Coney Island–Stillwell Avenue
Stations	10
Operation
Opened	1915–1918
Owner	City of New York
Operator(s)	New York City Transit Authority
Character	Open-Cut Elevated (at Stillwell Avenue)
Technical
Number of tracks	2-4
Track gauge	4 ft 8 1⁄2 in (1,435 mm)
Electrification	600V DC third rail

The BMT Sea Beach Line is a rapid transit line of the BMT division of the New York City Subway, connecting the BMT Fourth Avenue Line at 59th Street via a four-track wide open cut to Coney Island in Brooklyn. It has at times hosted the fastest express service between Manhattan and Coney Island, since there are no express stations along the entire stretch, but now carries only local trains on the N service, which serves the entire line at all times. The line north of 86th Street is also served by a few W trains during rush hours in the peak direction.

The following services use part or all of the BMT Sea Beach Line:

The modern line begins as a split from the BMT Fourth Avenue Line at a flying junction immediately south of 59th Street. Between the station and the split, crossover switches are provided between the local and express tracks of the Fourth Avenue Line, and then the express tracks curve east under the northbound local track to become the beginning of the Sea Beach Line. After emerging from the tunnel under Fourth Avenue, the two separate Sea Beach tracks rise on either side of a ramp which formerly connected to the original line to the Brooklyn shore at 65th Street in Bay Ridge.

After passing the former junction with the line to the shore, the Sea Beach widens to the width of four tracks. All stations have two side platforms with no platform access to the express tracks anywhere on the Sea Beach right-of-way.