Automatic train protection

Automatic train protection (ATP) is the generic term for train protection systems that continually check that the speed of a train is compatible with the permitted speed allowed by signalling, including automatic stop at certain signal aspects.

If it is not, ATP activates an emergency brake to stop the train.

[1]

This rail-transport related article is a stub.

You can help Wikipedia by expanding it.

ATP switchboard in a Taiwan Railways Administration DR2700 series carriage
Automatic Train Protection notice on a First Great Western InterCity 125