Automatic Train Control (ATC) is a safety system for railways, ensuring the safe and smooth operation of trains on ATC-enabled lines. There are several implementations and versions of ATC, and each is different.
It is especially common in Japan, where ATC is used on all Shinkansen (bullet train) lines. Shinkansen 0 Series at Fukuyama Station, April 2002 Shinkansen 500 Series at Kyoto Station, April 2002 300 (Left) and 700 Series Shinkansen at Tokyo Station The Shinkansen (新幹線) is a network of high speed rail lines in Japan on which the famous Bullet Trains run. ...
When a train is in the clear on a siding to be passed, its markers are turned to show green (or yellow) to the rear when it is clear of the main track; otherwise, red markers show the train is not clear of the main track.
Trains of the same class, and extra trains, must approach such points prepared to stop, unless a block system is in use and signals are clear.
Automatictrain stop complements operation by signal indications as naturally as automatic block signals complement time table and train order operation, giving nearly perfect safety, but it still can be thwarted by determined effort.
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