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No. 7 Line Extension

Manhattan, New York
New York City Transit Authority, part of the Metropolitan Transit Authority
RailWorks Business Unit 
L.K. Comstock & Company
RailWorks Transit

RailWorks completed this $513.7 million project with joint venture partner Skanska USA to furnish and install systems and finishes on the subway extension from Times Square to W. 25th Street and 11th Avenue in Manhattan, N.Y.


L.K. Comstock performed the following electrical work:

  • Installed the signal system on the new extension, including 45 signal/stops and two relay rooms,
  • Installed the communications and electrical systems as well as related alarms and tunnel lighting
  • Installed the traction power system for the third rail
  • Installed 60,000 feet of antenna cable

RailWorks Transit constructed approximately 14,000 LF of track, including two turnouts. Crews also performed all related plumbing and mechanical services.


Unique Features 

The 7 Line Extension brings the Flushing Line to 34th Street & 11th Avenue, at the heart of Manhattan's newest neighborhood. The subway extension helped promote new housing, restaurants and entertainment on the Far West Side. The new subway terminal improved service reliability for all riders of the 7 Line in Queens and Manhattan by providing additional storage space for trains.

Other participants 
Skanska USA, joint venture partner