Signals, Track & Interlockings
The Components of Safety
An interlocking is a series of signals and track switches that work in tandem to protect our customers. Each component of our signal system communicates with the others to ensure that no two trains can occupy the same track at the same time. Today, it is incredibly safe but also clearly outdated and breakdown-prone. In fact, much of our system dates back to the early 20th century, and only one subway line today, the Line, operates with modern signals.
The vast majority of MTA Capital Program investments are to maintain service and safety - and track, signals and signals related communication infrastructure account for over one third of those investments.