Automatic train protection

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ATP switchboard in a Taiwan Railways Administration DR2700 series carriage

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Automatic Train Protection notice on a First Great Western InterCity 125

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.

See also

• Advanced Civil Speed Enforcement System
• Anti Collision Device
• Automatic Warning System
• Automatische treinbeïnvloeding (ATB)
• British Rail's ATP system
• Continuous Automatic Warning System (CAWS)
• EBICAB
• European Train Control System (ETCS)
• Kavach
• Positive Train Control (PTC)
• Punktförmige Zugbeeinflussung (PZB)
• Train Protection & Warning System
• Train Warning System
• Transmission Voie-Machine (TVM)