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Church Avenue Signal Modernization

Transit & Systems
Brooklyn, New York
New York City Transit Authority, part of the Metropolitan Transit Authority
Business Unit 
L.K. Comstock & Company
RailWorks Transit
Project Description 

In this $119.3 million, 50-month project, RailWorks installed a modern, relay-based signal system and constructed track and enclosures for the new interlocking on the Culver Line between Ditmas Avenue and 4th Avenue stations.

Project Scope 

L.K. Comstock rehabilitated the signal system on the existing four-track railroad with two Interlockings and below-grade yard. The project called for a new communications-based train control (CBTC)-ready NYCT signal system design, furnished by Alstom Signaling Co.

L.K. Comstock and RailWorks Transit also performed track reconstruction, civil and electrical work associated with the construction of a two-story relay room building and three new central instrument rooms (CIRs); two located on the mezzanine level and one in the tunnel. Additional work included renovating the existing Church Avenue Tower and Dispatcher’s office. These structures include the latest communications, fiber optic network, security controls, inergen fire protection and associated HVAC equipment systems.


Unique Features 

Express Track B3 is designated to be a CBTC test track and will be used for non-CBTC passenger service. Conventional fixed block signals and traffic was installed on the line with CBTC-ready signals.

For the first two years of the contract, all wayside work was performed under piggy-backed general order (GO) service diversions controlled by the adjacent Culver Viaduct project contractor. This approach required extensive coordination, including weekly meetings with CPM, the Culver Viaduct contractor and the NYCT Tunnel Lighting Department, who installed all new tunnel lighting system concurrent with L.K. Comstock’s wayside installation work.

Other Participants 
Signal system equipment subcontractor Alstom Signaling Co. furnished all the signal equipment except the stop machines, which were manufactured by Twinco Manufacturing Co.