Punktförmige Zugbeeinflussung
After acknowledging the warning signal the train has to stay below the braking curve (German "Bremskurve") - fast trains may travel up to 165 km/h and they must reduce the speed to below 85 km/h after 23 seconds. Note that the operation of high speed trains beyond 165 km/h is not based on visual wayside signals or PZB inductors (using LZB or European Train Control System cab-signalling instead in Germany).
High-speed rail in the United Kingdom
At present, a mixture of Eurostar international services and Southeastern domestic passenger services use High Speed 1. Attempts to increase speeds to on both the East Coast Main Line (ECML) and West Coast Main Line (WCML) have all failed, partly because trains that travel above are considered to require in-cab signalling for safety reasons. The term High Speed Train (or HST125) is currently also used as a brand name for the present British fleet of Class 43 InterCity diesel trains.