The subway uses two kinds of signal systems: Automatic Block Signaling and Communications-Based Train Control (CBTC).īlock signaling-the kind seen in the MTA video above-is a manually operated method that has been in use since the subway’s inception.
It has two schemes: A Division and B Division, which were put in place when the subway was privately owned and operated by three separate companies (before the MTA was even a thing).
An interlocking signal mechanism at the New York Transit Museum, located in a decommissioned subway station. Hermann / MTA New York City TransitĪs with streets, subways have blocks, each typically some 1,000 feet long. Fixed-block signals are visible from subway platforms, and the information they provide to train operators are based on the location of the most recent train to have passed-this is known as a moving block system. But this method is imprecise, and because of the age of the signals, subway personnel do not actually know the exact location of the subway cars using block signaling. Much of the current system was installed from the 1930s to the 1960s, and requires custom replacement parts to be made in-house because the machinery is so outdated. While block signaling relies on manual operation, CBTC uses automatic, computer-based signaling. #Sinyal add ons trainz simulator 2009 manual# The equipment involved in CBTC is less visible and far more durable, making it less vulnerable. It’s also far more precise than its manually operated counterpart: It’s currently in use on the L line, which “consistently operates with an on-time performance higher than 90 percent, roughly 30 percentage points better than the system as a whole,” as Aaron Gordon recently reported. CBTC was recently rolled out along the 7 line, but the implementation didn’t go quite as smoothly as anticipated. Key dates in subway signal historyġ904: Block signaling is used on the city’s first subway line, the IRT Lexington Avenue line.ġ962: An experimental automated train is destroyed in a fire at Grand Central, delaying the installation of a modern signal system in NYC, despite the technology being adopted for transit systems elsewhere.ġ970: The practice of keying-by-“slowly moving past a red light if the track ahead was clear,” as the New York Times put it in 1973-is made illegal, making red signals mandatory with no exceptions and increasing the amount of delays caused by signal problems.ġ991: In 1991, a drunk motorman speeds through a signal, causing a subway to derail near the Union Square subway station, killing five. #Sinyal add ons trainz simulator 2009 series#.
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