Most trains on the New York City Subway are manually operated. As of 2022, the system currently uses automatic block signaling, with fixed wayside signals and automatic train stops. Many portions of t
A "repeater" signal in the Montague Street Tunnel, which mirrors the indications of the signal directly around the curve
A signal in the Flushing–Main Street station
A modern, un-renovated subway signal at Bowling Green station.
As a bonus feature, automatic train supervision allows for next-train indicators to be installed on A Division lines.
Communications-based train control is a railway signaling system that uses telecommunications between the train and track equipment for traffic management and infrastructure control. CBTC allows a tra
Signaling of the New York City Subway
…the modernization of the New York City Subway, the Metropolitan Transportation Authority (MTA) plans to upgrade and automate much of the system with communications-based train control (CBTC) technology, which will automatically start and stop trains. The CBTC system is mostly automated and uses a moving block system—which reduces…
CBTC deployment in Madrid Metro, Spain
Santo Amaro station on Line 5 of the partially CBTC-enabled São Paulo Metro
The SFO AirTrain in San Francisco Airport was the first radio-based CBTC system.
The safety distance (safe-braking distance) between trains in fixed block and moving block signalling systems