Bergen Street Signal Modernization

Project Highlights

  • Installed the New York City Transit Authority's first pilot of solid state interlocking technology
New York City Transit Authority, part of the Metropolitan Transit Authority
New York, New York
Provided By

L.K. Comstock worked with equipment and technology providers Alcatel and Safetran to replace the existing and limited relay-based Bergen Street interlocking with the first vital microprocessor-based interlocking for the New York City Transit Authority (NYCT).

L.K. Comstock’s $40 million Bergen Street project was NYCT’s first pilot of Solid State Interlocking (SSI) technology. L.K. Comstock, with Alcatel and Safetran, replaced the existing relay-logic-based interlocking with new microprocessor-based interlocking room equipment and standard wayside equiment. The completion of this work with new, upgraded technology restored NYCT's ability to maximize traffic through the area and provided the capability to monitor system performance, increase interlocking operations reliability and make available real-time equipment information to signal maintainers.

As the first SSI installation on the New York metro network, the Bergen Street project established key requirements for future SSI installations. The project was completed in November of 2006.

Unique Features

Prior to this project, the Bergen Streeet interlocking had been limited to the use of two of 16 switches and two of four track due to a relay room fire and a limited rebuild. With the continued growth of the Brooklyn area, the Bergen Street interlocking's capacity to direct two lines into Mahanttan became more important to the NYCT. This opportunity prompted the NYCT's final decision to provide modern technology to rebuild this interlocking, which became NYCT's first pilot to incorporate Solid State Interlocking (SSI) technology. With its high-density transit environment, Bergen Street offered a demanding interlocking environment for the highly adaptable interlocking technology.