Kereta Bawah Tanah Kota New York
Catatan kaki

1 2 3  "Subway and Bus Ridership Statistics 2010". New York Metropolitan Transportation Authority. Diarsipkan dari versi asli tanggal 2012-04-22. Diakses tanggal May 17, 2011.  This source does not reflect the opening of a free transfer at the South Ferry – Whitehall Street station in March 2009.
↑  The IRT main line, which is considered to be the first New York City "subway" line, opened in 1904; however, the Ninth Avenue Line, a predecessor elevated railroad line, operated its first trial run on July 3, 1868, according to Facts and Figures 1979–80, published by the New York City Transit Authority See also nycsubway.org, and the West End Line railroad opened in 1863. A small portion of the latter line's original right-of-way is still in daily use near Coney Island. thethirdrail.net
1 2  Hood, Clifton. 722 Miles. Baltimore, MD: Johns Hopkins University Press, 2004.
↑  Stop by Stop, Subway’s Decline and Growth in 2009. The New York Times. Published April 25, 2010. Retrieved October 30, 2010.
↑  "New York City Subway & Path". www.urbanrail.net. Diakses tanggal November 7, 2010.
↑  New York State Comptroller. "A Guide for Evaluating the Metropolitan Transportation Authority's Proposed Capital Program for 2000 Through 2004". www.osc.state.ny.us. Diarsipkan dari versi asli tanggal 2009-01-09. Diakses tanggal July 7, 2008.
↑  "(New York City) Subways (Facts and Figures under title of Annual Subway Ridership)". MTA.info. May 17, 2011. Diarsipkan dari versi asli tanggal 2012-04-25. Diakses tanggal 2011-05-18.
↑  Baker, Al; Pérez-Peña, Richard (December 20, 2005). "With Terrorism Concerns in Mind, Police Prepare to Guard a Shuttered System". The New York Times. Diakses tanggal July 7, 2008.
↑  "The Pneumatic Tunnel Under Broadway (1870)". nycsubway.org. Diarsipkan dari versi asli tanggal 2008-05-05. Diakses tanggal July 7, 2008.  (extract from Scientific American March 5, 1870)
↑  Mark S. Feinman. "History of the Independent Subway". nycsubway.org. Diakses tanggal July 7, 2008.
↑  nycsubway.org — The New York Transit Authority in the 1970s
1 2  nycsubway.org — The New York Transit Authority in the 1980s
↑  Kennedy, Randy. "Tunnel Vision; With Station's Reopening, Even Commuters Smile", The New York Times, September 17, 2002. Accessed October 6, 2007.
↑  Brian Abbott. September 11: Three Years Later. Diarsipkan 2016-03-14 di Wayback Machine. Several maps showing changes in lower Manhattan from July 2001 to September 2002.
↑  "mta.info: Superstorm Sandy Timeline".
1 2 3 4  "www.nycsubway.org: The New York Subway: Chapter 02, Types and Methods of Construction". www.nycsubway.org. Diakses tanggal 2015-11-01.
↑  DuTemple, Lesley A. (October 1, 2002). The New York Subways. Twenty-First Century Books. ISBN 9780822503781. Diakses tanggal 28 January 2016.
↑  MacKechnie, Christopher. "The Two Methods of Subway Construction". about.com. Diarsipkan dari versi asli tanggal 2016-12-10. Diakses tanggal May 7, 2014. In exchange for these advantages are two major disadvantages. One is financial: "deep bore" construction costs significantly more than 'cut and cover'
↑  "No. 7 Subway Line Extension". Richard Dattner & Partners Architects. Diarsipkan dari versi asli tanggal 2012-03-15. Diakses tanggal February 28, 2010.
↑  "West Side Development Project Gets The Green Light". NY1. December 21, 2009. Diarsipkan dari versi asli tanggal 2012-04-07. Diakses tanggal February 28, 2010.
↑  Cuza, Bobby (February 19, 2009). "Crews Lower Giant Drill Into 7 Line Tunnel". NY1. Diarsipkan dari versi asli tanggal 2009-05-05. Diakses tanggal February 28, 2010.
↑  "New York State Society of Professional Engineers Recognizes No. 7 Line Project". Tunnel Business Magazine. July 3, 2013. Diakses tanggal August 20, 2013.
↑  " "Blasting on Second Avenue". thelaunchbox.blogspot.com. March 22, 2010.
↑  Siff, Andrew (May 14, 2010). "2nd Ave. Subway Tunnel Dig Begins". WNBC. Diakses tanggal May 14, 2010.
↑  "Tunneling Begins Under Second Avenue". MTA. May 14, 2010. Diarsipkan dari versi asli tanggal 2012-08-17. Diakses tanggal May 17, 2010.
↑  Various (September 23, 2011). "Second Avenue Subway has a breakthrough moment; several billion more are all the M.T.A. wants". Capital New York. Diarsipkan dari versi asli tanggal 2014-03-31. Diakses tanggal March 31, 2014.
↑  Official paint monikers since the colors were fixed in 1979: Grynbaum, Michael (May 10, 2010). "Take the Tomato 2 Stops to the Sunflower". New York Times, City Room Blog. Diakses tanggal May 11, 2010.
↑  Official MTA video mentions "lime green" for the G line. "Subway Colors and Names". MTA Info. July 15, 2010. Diakses tanggal August 5, 2010.
↑  "mta.info - Developer Data Downloads". mta.info.