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In the event a train's crew exceeds a speed restriction a penalty brake application is applied bringing the train to a complete stop [3]: 350 in the same fashion as existing automatic train control (ATC) systems. Speed restrictions required by the signal system are provided by the legacy Pulse code cab signaling system, which has been in ...
The switch operator has a switchboard in their tower that allows them to change the switches. [1]: xii [7]: 74 [6] Interlocking signals also tell train operators which way switches on the subway are set. The top part of an interlocking signal indicates the condition of the block ahead, while the lower part indicates the route selected.
MTA Staten Island Railway Automatic Speed Control: A hybrid of the PRR/LIRR systems and Rapid Transit power-frequency cab code. The ATC applies service braking in response to overspeed conditions. 75-120-180-270 are used as speed commands. Zero code is used for stop rather than restricting, which is 50PPM. 420 is used as a latch-out.
Automatic train control (ATC) is a general class of train protection systems for railways that involves a speed control mechanism in response to external inputs. For example, a system could effect an emergency brake application if the driver does not react to a signal at danger.
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The advanced processor-based speed control algorithms found in PTC systems claim to be able to properly regulate the speed of freight trains over 5,000 feet (1,500 m) in length and weighing over 10,000 short tons (9,100 t), but concerns remain about taking the final decision out of the hands of skilled railroad engineers.
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The first mechanical ATS systems in Japan were introduced on the Tōkaidō Main Line in 1921, followed by the Tokyo Metro Ginza Line in 1927; but ATS did not become commonplace in the country until the late-1960s as a result of the Mikawashima train crash which occurred in 1962. Below is a list of ATS systems that are specific to Japan only: