Signaling of the New York City Subway
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 the signaling system were installed between the 1930s and 1960s. Because of the age of the subway system, many replacement parts are unavailable from signaling suppliers and must be custom-built for the New York City Transit Authority, which operates the subway. Additionally, some subway lines have reached their train capacity limits and cannot operate extra trains in the current system.
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.
The IRT Dyre Avenue Line is a New York City Subway rapid transit line, part of the A Division. It is a branch of the IRT White Plains Road Line in the northeastern section of the Bronx, north of East 180th Street. As of 2013, it has a daily ridership of 34,802.
A 5 train enters the Morris Park station in the Bronx on the IRT Dyre Avenue Line
