Second Avenue Subway

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 which 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 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 10 miles (16 km) and 19 stations long, serve a projected 724,000 daily riders, and cost more than $24.7 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 began construction in June 2026. 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...