Transmission balise-locomotive
Transmission balise-locomotive is a train protection system used in Belgium and on Hong Kong's East Rail line.
TBL1-balise
A train protection system is a railway technical installation to ensure safe operation in the event of human error.
Berlin S-Bahn train stop in its engaged (left) and disengaged (right) position
Trackside magnets for very simple data communication. Outside and middle of track: Integra-Signum, other two (yellow) magnets: ZUB