The South Brooklyn Railway is a railroad in the New York City borough of Brooklyn. It is owned by the government of New York City and operated by the New York City Transit Authority. Its original main line ran parallel to 38th Street from the Upper New York Bay to McDonald Avenue, and south on McDonald Avenue to the Coney Island Yards, mostly underneath the former Culver Shuttle and the IND Culver Line of the New York City Subway.

The IND Culver Line is a rapid transit line of the B Division of the New York City Subway, extending from Downtown Brooklyn south to Coney Island, Brooklyn, New York City, United States. The local tracks of the Culver Line are served by the F service, as well as the G between Bergen Street and Church Avenue. The express tracks north of Church Avenue are used by the <F> train during rush hours in the peak direction. The peak-direction express track between Ditmas Avenue and Avenue X has not seen regular service since 1987.