The Automatic train protection reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Automatic train protection

Automatic train protection is speed and distance supervision, usually intervening (usually deploying emergency break, as a last measure) when the driver of a train omits to react on optical signals given from the wayside system. ATP is given permitted speed and location information from the track via encoded balise(s), encoded track circuit or more recently via radio.

This article is a stub. You can help Wikipedia by expanding it.

This is the "Automatic train protection" reference article from the English Wikipedia. All text is available under the terms of the GNU Free Documentation License. See also our Disclaimer.