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
The international definition of high-speed rail encompasses lines with a top speed of at least and existing lines with a top speed of around . As of 2011, there are four "classic" main railway lines in Britain operating at up to , plus of purpose-built high-speed line.