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Balise EBICAB in the Mediterranean Corridor. A balise typically needs no power source. In response to radio frequency energy broadcast by a Balise Transmission Module mounted under a passing train, the balise either transmits information to the train (uplink) or receives information from the train (downlink, although this function is rarely used).
A fixed-data balise is programmed to transmit the same data to every train. Information transmitted by a fixed balise typically includes: the location of the balise; the geometry of the line, such as curves and gradients; and any speed restrictions. The programming is performed using a wireless programming device.
An additional safety measure is the addition of an additional balise 300m up-line, which forces an automatic stop on trains travelling at more than 40 km/h ahead of a red signal. [2] The roll-out of TBL1+ was accelerated after the Halle train collision on 15 February 2010, which killed 19 and injured 171 people.
The second generation ZUB 262 places the balise in the middle of the rail as any other Eurobalise. While the GNT system allows a maximum of 50 km/h (31 mph) extra speed over the normal line speed it is still restricted to a maximum of 160 km/h (99 mph) as the traditional line side signalling is used for train operation. [ 2 ]
Balise tele-powering and down-link (train to ground) systems 984–7484 kHz: Balise up-link (ground to train) systems 7.3–23.0 MHz: Loop up-link (ground to train) systems Annex 5. Road transport and traffic telematics (RTTT) 5795–5805 MHz 5805-5815 MHz: C: 63–64 GHz: V: Vehicle to vehicle and road to vehicle systems 76–77 GHz: W
Contrôle de Vitesse par Balises (Speed control by beacons), abbreviated to KVB [note 1] is a train protection system used in France and in London St. Pancras International station.