NYC subway’s modernization faces setbacks as its first advanced signaling system, once considered cutting-edge, now needs replacement after just two decades of service. This is reported by the railway transport news portal Railway Supply.

New York City introduced CBTC on the L train in the early 2000s, allowing faster, safer travel through automated control. But the system, installed nearly 25 years ago, will reach the end of its lifecycle in 2028.

NYC subway’s modernization hits critical challenge
Photo: MTA/Trent Reeves

Many subway lines still rely on “fixed block” signals from the 1930s. These mechanical systems, though outdated, have operated for over a century, while modern CBTC technology demands upgrades much sooner.

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NYC subway’s aging CBTC requires urgent replacement

MTA leaders promoted CBTC as the key to improving service. Yet, current plans cover less than half the network within a decade. This gap highlights the challenges in updating infrastructure millions use daily.

Sean Fitzpatrick, New York City Transit’s Deputy Vice President, said servers known as “zone controllers,” which calculate safe train spacing, must be replaced with advanced computers. Radios could also move to wireless, alongside software improvements.

“You’re probably not using a laptop from 25 years ago,” Fitzpatrick noted, stressing minimal disruptions during upgrades since track equipment stays intact.

NYC subway’s modernization budget prioritizes new lines

The next five-year plan invests $5.4 billion in CBTC expansion for the A train’s Rockaway branches, the Rockaway S shuttle, parts of the J and Z, and major sections of the N, Q, R, and W lines.

Experts believe the MTA may adopt train-centric CBTC using 5G instead of radios. Tracy Bowdwin, a former MTA engineer, said short-term inconvenience will lead to a more efficient, reliable system for riders in the long run.

“Riders will face some pain,” Bowdwin said, “but they will gain a safer, modernized subway experience.”

Source: gothamist.com

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