Second Avenue Subway

E51029

New York City Subway line infrastructure project rapid transit line

The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.

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AI illustration

All labels observed (18)

Label	Occurrences
Second Avenue Subway canonical	25
Second Avenue Subway Phase 1	9
Phase 1 of the Second Avenue Subway	3
Second Avenue Subway (via Lexington Avenue–63rd Street)	2
Second Avenue Subway Phase 1 art program	2
Second Avenue Subway (Manhattan segment)	1
Second Avenue Subway (planned)	1
Second Avenue Subway Phase 1 Upper East Side stations	1
Second Avenue Subway Phase 2	1
Second Avenue Subway Phase 3	1
Second Avenue Subway Phase 4	1
Second Avenue Subway line	1
Second Avenue Subway phase 1	1
Second Avenue Subway service	1
Second Avenue Subway services	1
Second Avenue Subway trains	1
Second Avenue Subway trains (planned)	1
Second Avenue Subway tunnel	1

How this entity was disambiguated

This entity first appeared as the object of triple T386930 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Second Avenue Subway
Context triple: [Upper East Side, traversedBy, Second Avenue Subway]

A. Flushing Line
The Flushing Line is a New York City Subway service in Queens and Manhattan, best known today as the 7 train running between Flushing–Main Street and Hudson Yards.
B. Lexington Avenue Line
The Lexington Avenue Line is a major New York City Subway route in Manhattan that carries the 4, 5, and 6 trains and is one of the system’s busiest and most important north–south corridors.
C. Lenox Avenue Line
The Lenox Avenue Line is a major New York City Subway route in Harlem, Manhattan, primarily served by IRT trains running beneath Lenox Avenue.
D. New Lots Line
The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
E. Broadway–Seventh Avenue Line
The Broadway–Seventh Avenue Line is a major New York City Subway route in Manhattan and the Bronx, primarily served by the 1, 2, and 3 trains.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Second Avenue Subway
Target entity description: The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.

A. Flushing Line
The Flushing Line is a New York City Subway service in Queens and Manhattan, best known today as the 7 train running between Flushing–Main Street and Hudson Yards.
B. Lexington Avenue Line
The Lexington Avenue Line is a major New York City Subway route in Manhattan that carries the 4, 5, and 6 trains and is one of the system’s busiest and most important north–south corridors.
C. Lenox Avenue Line
The Lenox Avenue Line is a major New York City Subway route in Harlem, Manhattan, primarily served by IRT trains running beneath Lenox Avenue.
D. New Lots Line
The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
E. Broadway–Seventh Avenue Line
The Broadway–Seventh Avenue Line is a major New York City Subway route in Manhattan and the Bronx, primarily served by the 1, 2, and 3 trains.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	New York City Subway line ⓘ infrastructure project ⓘ rapid transit line ⓘ
artProgram	MTA Arts & Design permanent installations ⓘ linked to: MTA Arts & Design installations
borough	Manhattan ⓘ
connectsTo	63rd Street–Lexington Avenue ⓘ BMT Broadway Line ⓘ IND Queens Boulevard Line ⓘ Lexington Avenue Line ⓘ
constructionMethod	cut-and-cover ⓘ tunnel boring machine ⓘ
constructionStart	2007 ⓘ
country	United States of America ⓘ
features	ADA-accessible stations ⓘ air-conditioned stations ⓘ full-length mezzanines at some stations ⓘ platform screen doors provision-ready infrastructure ⓘ
fundingSource	Metropolitan Transportation Authority capital program ⓘ State of New York ⓘ linked to: U.S. state of New York federal government of the United States ⓘ linked to: United States government
futurePhase	Phase 2 ⓘ Phase 3 ⓘ Phase 4 ⓘ
historyEvent	funding crises in 1970s halted earlier work ⓘ multiple construction attempts in mid-20th century were started and abandoned ⓘ originally proposed in 1920s as part of IND Second System ⓘ
lineColorOnMap	turquoise ⓘ
lineDesignation	Second Avenue Line ⓘ
locatedIn	Manhattan ⓘ New York City ⓘ New York State ⓘ linked to: New York
notableStationArt	72nd Street station artwork by Vik Muniz ⓘ 86th Street station artwork by Chuck Close ⓘ 96th Street station artwork by Sarah Sze ⓘ
openingDate	2017-01-01 ⓘ
operator	Metropolitan Transportation Authority ⓘ New York City Transit Authority ⓘ
ownedBy	Metropolitan Transportation Authority ⓘ
phase	Phase 1 ⓘ
phase1IntermediateStation	86th Street ⓘ
phase1TerminusNorth	96th Street ⓘ linked to: East 96th Street
phase1TerminusSouth	72nd Street ⓘ linked to: West 72nd Street
plannedExtensionDirection	north to Harlem–125th Street ⓘ south to Lower Manhattan ⓘ
planningStart	1920s ⓘ
purpose	provide north–south transit on Manhattan’s East Side ⓘ relieve congestion on the Lexington Avenue Line ⓘ
relieves	Lexington Avenue Line crowding ⓘ
runsAlong	Second Avenue ⓘ
servicePattern	Q train operates via Second Avenue between 63rd Street and 96th Street ⓘ
status	partially completed ⓘ
usesServiceDesignation	Q ⓘ

How these facts were elicited

Referenced by (54)

Full triples — surface form annotated when it differs from this entity's canonical label.

Upper East Side → traversedBy → Second Avenue Subway ⓘ

Q train → usesLine → Second Avenue Subway ⓘ

Lenox Hill → servedBy → Second Avenue Subway ⓘ

East Side of Manhattan → hasTransportation → Second Avenue Subway ⓘ

96th Street (Second Avenue Line) → partOfProject → Second Avenue Subway Phase 1 ⓘ