MTA Authorizes $110M Subway Signal Upgrades on Lexington Avenue 4/5/6 Express Corridor

NEW YORK, NY — The Metropolitan Transportation Authority (MTA) Board approved a $110-million signal modernization contract on Saturday, funding the installation of Communications-Based Train Control (CBTC) along the Lexington Avenue Line between Grand Central-42nd Street and 125th Street in East Harlem.

Digital Signaling Architecture and Headways

The Lexington Avenue 4/5/6 line carries over 1.2 million daily riders, making it the most heavily utilized rapid transit corridor in North America. The digital signaling project replaces 1930s-era electro-mechanical track relays with solid-state computer interlockings and wireless transponder positioning.

The modernization allows the MTA to safely decrease train headways from two minutes down to 90 seconds, adding capacity for up to six additional express trains per hour during peak morning and evening travel periods.

Rider Experience and Reliability Metrics

Signal malfunctions account for nearly 30% of all train delays on the Lexington Avenue trunk line. MTA New York City Transit leadership stated that CBTC implementation on the 7 and L lines demonstrated a 98% on-time performance rate and that extending the technology to Manhattan's East Side is essential to relieve chronic platform crowding.

Riders Alliance and transit advocates commended the contract approval, urging the MTA to maintain aggressive installation timelines while minimizing weekend service disruptions.

Project Execution

Signaling installation will occur during scheduled overnight track maintenance shifts starting in October 2026, with the modernized CBTC system fully active by late 2027.