Technology
ATS systems can be mechanical, where an arm is raised on the track to engage a lever on the train to apply the brakes and cut the power. The mechanical systems around the world are generally incompatible. Mechanical systems are not suitable at high speeds, say greater than 110 km/h.
ATS systems can also be non-contact magnetic or inductive. Again they tend to be incompatible. Non contact systems are suitable for high speeds.
Read more about this topic: Automatic Train Stop
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