Second Avenue Subway

Second Avenue Subway
The Second Avenue Line is served by the Q. Limited service is also provided by the N and R. The T (turquoise) will serve the full line in the future if Phase 3 is completed.
Overview
Status	Open from 72nd Street to 96th Street Phase 2 to Harlem–125th Street in design
Owner	City of New York
Locale	Manhattan, New York City, United States
Termini	Harlem–125th Street Hanover Square
Stations	3 (13 more planned)
Service
Type	Rapid transit
System	New York City Subway
Operator(s)	New York City Transit Authority
Daily ridership	45,367[1]
History
Opened	January 1, 2017 (2017-01-01) (first phase)
Technical
Line length	8.5 miles (13.7 km)
Track length	17 miles (27 km)
Number of tracks	2
Character	Fully underground
Track gauge	4 ft 8+1⁄2 in (1,435 mm)
Electrification	600 V DC third rail
Route map Legend Yard tracks & provision for Bronx expansion Lexington Avenue Line Harlem–125th Street (planned) Lexington Avenue Line 116th Street (planned) 106th Street (planned) Line end for Phase 1 96th Street 86th Street 72nd Street 63rd Street Lines Broadway Line 55th Street (proposed) Lexington Avenue–53rd Street (53rd Street Line) 42nd Street (proposed) Grand Central–42nd Street (Flushing Line) 34th Street (proposed) 23rd Street (proposed) 14th Street (proposed) Third Avenue (BMT Canarsie Line) Houston Street (proposed) Second Avenue (Sixth Avenue Line) Chrystie Street Connection to Williamsburg Bridge Nassau Street Line Grand Street (proposed) Chrystie Street Connection to Manhattan Bridge Broadway Line to Manhattan Bridge Chatham Square (proposed) Seaport (proposed) Eighth Avenue Line Broadway–Seventh Avenue Line Hanover Square (proposed) provision for Brooklyn expansion This diagram: view talk edit

The Second Avenue Subway (internally referred to as the IND Second Avenue Line by the MTA and abbreviated to SAS) is a New York City Subway line that runs under Second Avenue on the East Side of Manhattan. The first phase of this new line, with three new stations on Manhattan's Upper East Side, opened on January 1, 2017. The full Second Avenue Line (if it will be funded) will be built in three more phases to eventually connect Harlem–125th Street in East Harlem to Hanover Square in Lower Manhattan. The proposed full line would be 8.5 miles (13.7 km) and 16 stations long, serve a projected 560,000 daily riders, and cost more than $17 billion.

The line was originally proposed in 1920 as part of a massive expansion of what would become the Independent Subway System (IND). In anticipation of the Second Avenue Subway being built to replace them, parallel elevated lines along Second Avenue and Third Avenue were demolished in 1942 and 1955, respectively, despite several factors causing plans for the Second Avenue Subway to be cancelled. Construction on the line began in 1972 as part of the Program for Action. It was halted in 1975 because of the city's fiscal crisis, leaving only a few short segments of tunnels completed. Work on the line restarted in April 2007 following the development of a financially secure construction plan. The first phase of the line, consisting of the 96th Street, 86th Street and 72nd Street stations, as well as 1.8 mi (2.9 km) of tunnel, cost $4.45 billion. A 1.5-mile (2.4 km), $6 billion second phase from 96th to 125th Streets is almost ready to start construction as of 2024^[update].

Phase 1 is served by the Q train at all times and limited rush-hour N and R trains. Phase 2 will extend the line's northern terminus from 96th Street to Harlem–125th Street. Both the Q and limited N services will be extended to 125th Street. Phase 3 will extend the line south from 72nd Street to Houston Street in Manhattan's Lower East Side. Upon completion, a new T train will serve the entire line from Harlem to Houston Street. Phase 4 will again extend the line south from Houston Street to Hanover Square, maintaining the T designation for the entire line. The T will be colored turquoise since it will use the Second Avenue Line through Midtown Manhattan.