4 (New York City Subway service)
|Lexington Avenue Express|
Note:dashed line shows limited rush hour and late night service to/from New Lots Avenue
|Southern end||Utica Avenue or
New Lots Avenue (late nights & limited rush hour service)
The 4 Lexington Avenue Express is a rapid transit service of the New York City Subway. It is colored apple green on station signs, route signs, and the official subway map, since it uses the IRT Lexington Avenue Line in Manhattan.
The 4 service operates at all times. The daytime service pattern is between Woodlawn in the Bronx and Utica Avenue in Crown Heights, Brooklyn via Jerome Avenue Local in the Bronx, Lexington Avenue Express in Manhattan, and Eastern Parkway Express in Brooklyn.
During late nights, approximately 11:30 p.m. to 6:00 a.m. (Sundays to 8:30 a.m.) the 4 is extended to/from New Lots Avenue in New Lots, Brooklyn via Livonia Avenue to replace the 3. During this time, the 4 runs local east of Franklin Avenue. After midnight, the 4 serves all stops in Brooklyn (except Hoyt Street). In Manhattan, 4 trains run local between approximately 1:00 a.m. and 5:00 a.m.
Limited rush hour trains run to New Lots Avenue even when the 3 is running. During rush hours, the 4 skips 138th Street – Grand Concourse in the peak direction (to Manhattan during a.m. hours, from Manhattan during p.m. hours). Also during that period, some northbound trains run express north of 167th Street and terminate at Burnside Avenue.
Service history 
During the extension of the IRT Lexington Avenue Line north of 42nd Street – Grand Central Terminal, shuttle trains served the IRT Jerome Avenue Line (which at the time was only between East 149th Street – Grand Concourse and Kingsbridge Road).
On July 17, 1918, the entire Jerome and Lexington Avenue Lines were completed and the connection to the Broadway – Seventh Avenue Line at 42nd Street was removed. Trains began running between Woodlawn and Bowling Green.
Beginning November 24, 1925, rush hour trains ran to Crown Heights – Utica Avenue. Over the next three years, trains were gradually extended there during other times.
Beginning December 20, 1946, trains were extended from Utica to New Lots Avenue during late nights.
Beginning April 8, 1960, late night trains were rerouted to Flatbush Avenue.
Beginning July 10, 1983, the current 4 service was formed, except that midday trains ran only to Atlantic Avenue. On January 18, 1988, those trains were extended to Utica Avenue as well.
From June 8, 2009, to June 26, 2009, New York City Transit conducted a pilot program for express Jerome Avenue Line service. Four morning weekday rush hour trains from Woodlawn stopped at Mosholu Parkway, Burnside Avenue and 149th Street – Grand Concourse before they resumed regular service in Manhattan and Brooklyn.
On October 26, 2009, another 4 express pilot program was implemented based on the success of the first and ran until December 11, 2009. This program was the same as the one in June except that express trains stopped at Bedford Park Boulevard – Lehman College.
Service pattern 
The following table shows the lines used by the 4 service, with shaded boxes indicating the route at the specified times:
|IRT Jerome Avenue Line (full line)||Woodlawn||149th Street – Grand Concourse||local|
|138th Street – Grand Concourse|
|IRT Lexington Avenue Line (full line)||125th Street||Brooklyn Bridge – City Hall||express|
|Fulton Street||Bowling Green||all|
|Joralemon Street Tunnel|
|IRT Eastern Parkway Line (full line)||Borough Hall||Crown Heights – Utica Avenue||express|
|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 late nights only|
|Stops weekdays only|
|Stops all times except rush hours in the peak direction|
|Stops rush hours only|
|Stops rush hours in the peak direction only|
|Time period details|
- "MTA New York City Transit Pilots Bronx Express Service Along the Jerome Ave. Line" (Press release). New York Metropolitan Transportation Authority. 2009-06-04. Retrieved 2009-06-08.
- MTA NYC Transit – 4 Lexington Avenue Express
- "4 Train Timetable, Effective December 16, 2012". New York Metropolitan Transportation Authority. Retrieved 2013-04-26.