3 (New York City Subway service)
|Seventh Avenue Express|
|Northern end||Harlem – 148th Street|
|Southern end||New Lots Avenue (all except nights)
Times Square – 42nd Street (late nights)
The 3 Seventh Avenue Express is a rapid transit service in the A Division of the New York City Subway. Its route emblem, or "bullet", is colored tomato red since it uses the IRT Broadway – Seventh Avenue Line through most of Manhattan. The 3 operates between 148th Street in Harlem, Manhattan and New Lots Avenue in East New York, Brooklyn, making express stops in Manhattan and all stops in Brooklyn, except nights when it short turns at Times Square – 42nd Street in Midtown Manhattan.
On July 1, 1918, the entire IRT Broadway – Seventh Avenue Line was completed. 3 trains were rerouted south of 42nd Street from the IRT Lexington Avenue Line to this new line. They now made all stops to South Ferry.
As of 1934, 3 service operated between 145th Street and South Ferry except late nights, when service operated between 145th Street and 96th Street, making local stops.
Beginning on January 4, 1955, some 3 trains ran express in Manhattan during rush hours and were extended to Flatbush Avenue; a few layups and put-ins ran to New Lots. Late night service was discontinued between 145th Street and 96th Street. 
Beginning on December 20, 1957, 3 trains were rerouted to New Lots Avenue during rush hours.
On February 6, 1959, all trains except late nights made express stops in Manhattan as part of the "West Side Improvement" and ran to Flatbush Avenue.
Beginning on April 8, 1960, 3 trains rerouted to New Lots. Weekday evening service was cut to a shuttle 145th Street to 135th Street only. 
Beginning on April 18, 1965, 3 service ran to Flatbush again.
Beginning on October 17, 1965, weekend evening service was also cut to a shuttle 145th Street to 135th Street.
On May 13, 1968, trains were extended to the newly completed 148th Street – Lenox Terminal.
Beginning on December 15, 1968, all-night shuttle service between 145th Street and 135th Street were brought back, this was the first time since 1955.
Beginning on May 23, 1976, the current practice of starting Sunday service late (9 or 10 AM) began.
Beginning on August 5, 1990, late-night shuttles between 148th Street and 135th Street were discontinued and replaced by shuttle buses.
Beginning on September 4, 1994, late-night shuttles between 148th Street and 135th Street were resumed, but were discontinued again on September 10, 1995.
After September 11, 2001, the 3 service became a local in Manhattan. After a few switching delays at 96th Street, service was changed on September 19, 2001. It ran in Manhattan as an express between Harlem – 148th Street and 14th Street and was replaced by 1 service in Brooklyn. It returned to New Lots Avenue on September 15, 2002.
The following table shows the lines used by the 3, with shaded boxes indicating the route at the specified times:
|IRT Lenox Avenue Line (full line)||Harlem – 148th Street||Central Park North – 110th Street||all|
|IRT Broadway – Seventh Avenue Line||96th Street||Times Square – 42nd Street||express|
|34th Street – Penn Station||Chambers Street|
|IRT Broadway – Seventh Avenue Line,
|Park Place||Borough Hall||all|
|IRT Eastern Parkway Line (full line)||Hoyt Street||Crown Heights – Utica Avenue||local|
|IRT New Lots Line (full line)||Sutter Avenue – Rutland Road||New Lots Avenue||all|
For a more detailed station listing, see the articles on the lines listed above.
|Station service legend|
|Stops all times|
|Stops all times except late nights|
|Stops weekdays only|
|Stops rush hours only|
|Stops weekdays in the peak direction only|
|Stops rush hours/weekdays in the peak direction only|
|Time period details|
- "Service Enhancements on 3 Line" (Press release). MTA New York City Transit. 2008-07-24. Retrieved 2008-07-26.
- Neuman, William (2008-06-10). "Subway Service Increase to Be Less Than Hoped". The New York Times..
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