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Second Avenue Subway Line

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

L.K. Comstock led the joint venture to construct the track and systems for Phase I of New York City Transit’s Second Avenue Subway.


The 55-month, $261.9 million project included installing the track, train signals, traction power and communications on the newly bored, two-track system on the East Side of Manhattan between 105th Street and the existing subway station at 63rd Street. Additional project work included modifying existing facilities and systems to ensure connectivity with the Second Avenue subway system. Crews also constructed three rail crossovers along this route, which will allow trains to switch tracks in case of emergency.

The project was a joint venture between L.K. Comstock and Skanska USA’s civil construction business unit.  L.K. Comstock was awarded a 66.67 percent share, about $175 million of the project total. Work on the project commenced in February 2012 and has a targeted completion date in 2017. This work is part of the MTA’s $4.45 billion project to build Phase 1 of the Second Avenue Subway, the first major expansion of the New York City Transit subway system in more than 50 years.

Unique Features 

The Second Avenue Subway will reduce overcrowding and delays on the Lexington Avenue line, improving travel for both city and suburban commuters, and provide better access to mass transit for residents of the far East Side of Manhattan. The line was built in phases; the first phase of the Second Avenue Subway provides service from 96th St. to 63rd St.

The new line:

  • serves more than 200,000 daily riders
  • decreases crowding on the Lexington Avenue Line by as much as 13%, or 234,000 fewer riders on an average weekday; and
  • reduces travel times by up to 10 minutes or more (up to 27%) for those on the far East Side or those traveling from the East Side to west Midtown
Other participants 
Joint venture partner Skanska USA