Siemens Mobility, in collaboration with L.K. Comstock, an electrical contractor specializing in rail transportation systems, has been awarded a contract by the Metropolitan Transportation Authority (MTA) to modernize the Fulton–Liberty lines in New York by introducing advanced communications-based train control (CBTC) technology.
The USD 390 million contract calls for the modernization of 23 stations and 65 km of track with the Trainguard MT system, developed by Siemens Mobility, in accordance with New York City subway interoperability standards. The nearly century-old infrastructure in Brooklyn and Queens will be completely replaced.
The project will reduce the interval between trains to 90 seconds, resulting in a significant increase in capacity and shorter wait times. The new technology integrates state-of-the-art traffic control functions and wireless communications, including 5G networks, for more efficient and flexible system operation.
“The modernization of the Fulton–Liberty lines in New York is not just a technological advancement, but a commitment to more efficient and frequent transit for millions of passengers in New York,” said Michael Peter, CEO of Siemens Mobility.
Representatives from L.K. Comstock also emphasized the importance of the project, highlighting its role in developing a more robust and higher-capacity transit system for the future.
Steps to modernize the lines
As part of the work, Siemens Mobility will integrate the new CBTC technology on two subway lines, replacing the old signaling systems with modern solutions, including axle counters and 5G-based radio communications. These will enable real-time train control and safer, more efficient operations.
Additionally, L.K. Comstock will decommission the old equipment and install new signaling systems, including 94 switch mechanisms and four rail traffic control centers. The project involves installing over 1,200 km of cables in tunnels and within the new facilities.
Another key element is the introduction of 5G mobile communication services for passengers, through the installation of a dedicated system of antennas and fiber optics in tunnels, across a network covering 18 stations and 62 railway segments.
Upon completion of the modernization, Siemens Mobility will provide system maintenance for 25 years, with the option to extend the contract. This long-term partnership aims to maintain a high level of reliability and performance in New York’s transit network.
The Fulton–Liberty lines, essential to the transit system
The Fulton–Liberty lines represent a key corridor in the city’s subway network, connecting important areas of Brooklyn and Queens.
Starting at Jay Street–MetroTech station, the Fulton line runs through the heart of Brooklyn, then connects with the Liberty line, which begins at Euclid Avenue station and ends in Ozone Park, Queens, providing connections to several major subway lines along the route.
Built in the 1930s and 1940s, this rail corridor is now a central element in the MTA’s vision to develop a modern, resilient, and future-ready transit system.
The A (Express) train uses the Fulton–Liberty lines for a significant portion of its route in Brooklyn and Queens, while the C (Local) train runs on the entire Fulton line in Brooklyn.
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