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.