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. During rush hours, several W trains serve the line north of 86th Street.
Open cut, looking west from 6th Avenue overpass, with the LIRR Bay Ridge Branch on the left and the BMT Sea Beach Line on the right.
16th Avenue powerhouse
Station headhouse at Avenue U station, pre-renovation
BMT Sea Beach line passes through South Brooklyn
The BMT Fourth Avenue Line is a rapid transit line of the New York City Subway, mainly running under Fourth Avenue in Brooklyn. The line is served by the D, N, and R at all times; the R typically runs local, while the D and N run express during the day and local at night. During rush hours, select W trains also serve the line. Northbound D and N trains run local along the line after 6:45 p.m. during weekdays as well. The line was originally built by the Brooklyn Rapid Transit Company and is now internally operated as part of the New York City Subway's B Division.
This is the Fourth Avenue Line Bridge over the Long Island Rail Road's Bay Ridge Branch. This bridge has space for two additional trackways.
A view of the Garfield Place substation, which is used to power the Fourth Avenue Line
The Lawrence Street station (now Jay Street–MetroTech) was built after that section of the line had already been completed.
The Bay Ridge–95th Street terminal station was opened in 1925.
