The subway modernization process has lagged significantly, causing the technology once leading-edge to require replacement within a few years. The L train was the first to receive communications-based train control (CBTC) technology, allowing automated and efficient train operation. However, the antiquated fixed block signals still in use have outlasted their expected lifespan. Officials recognize the need to upgrade equipment including computers and communication systems for trains. Yet current timelines suggest that less than half of the subway system will be modernized in the next decade, highlighting significant delays in improving service for millions of riders.
The subway system's modernization has taken so long that once cutting-edge technology for newer trains needs to be replaced. MTA's CBTC system on the L will reach the end of its useful life in 2028, almost 25 years after installation.
MTA officials have championed modern signals as a silver bullet to improve subway service. However, the current timeline would install the technology on less than half the system over the next decade.
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