Fd (New York City Subway service) in the context of "Lexington Avenue/51st Street station"

The Jackson Heights–Roosevelt Avenue/74th Street station is a New York City Subway station complex served by the IRT Flushing Line and the IND Queens Boulevard Line. Located at the triangle of 74th Street, Broadway, and Roosevelt Avenue in Jackson Heights, Queens, it is served by the 7, E, and F trains at all times; the R train at all times except late nights; the M train on weekdays during the day; and the <F> train during rush hours in the reverse peak direction.

The complex consists of two stations: the elevated station at Broadway–74th Street, built for the Interborough Rapid Transit Company (IRT) and Brooklyn Rapid Transit Company (BRT), and the underground IND station at Jackson Heights–Roosevelt Avenue, built for the Independent Subway System (IND). The elevated station was built as part of the Dual Contracts and opened on April 21, 1917; the station was also served by the BRT and its successor, the Brooklyn–Manhattan Transit Corporation, until 1949. The IND station opened on August 19, 1933, and was the terminus of the Queens Boulevard Line until 1936. Escalators between the two stations were installed in the 1950s, and the complex was substantially rebuilt between 2000 and 2005.

The IND Culver Line (formerly BMT 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.

The line is named after Andrew Culver, who built the original Culver Line that preceded the current subway line. The present-day line was built as two unconnected segments operated by the Independent Subway System (IND) and Brooklyn–Manhattan Transit Corporation (BMT). The northern section of the line, between Jay Street–MetroTech and Church Avenue, is a four-track line that was built for the IND in 1933, running primarily underground except for a short elevated section over the Gowanus Canal.

The Times Square–42nd Street station is a major New York City Subway station complex located under Times Square, at the intersection of 42nd Street, Seventh Avenue, and Broadway, in Midtown Manhattan. The complex allows free transfers between the IRT 42nd Street Shuttle, the BMT Broadway Line, the IRT Broadway–Seventh Avenue Line and the IRT Flushing Line, as well as to the IND Eighth Avenue Line a block west at 42nd Street–Port Authority Bus Terminal. The complex is served by the 1, 2, 3, 7, N and Q trains at all times, the W train during weekdays; the R and 42nd Street Shuttle (S) trains at all times except late nights; and <7> trains during rush hours in the peak direction. A free passageway from the shuttle platform to the 42nd Street–Bryant Park/Fifth Avenue station, served by the 7, <7>​​, B, ​D, ​F, <F>, and ​M trains, is open during the day from 6 a.m. to 12 a.m.

The present shuttle platforms were built for the Interborough Rapid Transit Company (IRT) as a local station on the city's first subway line, which was approved in 1900. The station opened on October 27, 1904, as one of the original 28 stations of the New York City Subway. As part of the Dual Contracts between the IRT and the Brooklyn–Manhattan Transit Corporation (BMT), the Broadway–Seventh Avenue Line platforms opened in 1917, followed by the Broadway Line platforms in 1918 and the Flushing Line platforms in 1928. The original platforms were also reconfigured to serve the shuttle. The complex has been reconstructed numerous times over the years. The free transfer between the IRT and BMT opened in 1948, while the transfer to the IND station was placed within fare control in 1988. The complex was placed on the National Register of Historic Places in 2004. In the early 21st century, the shuttle station was reconfigured.