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 States
However, state-level departments of transportation and council of governments may also use different definitions for high-speed rail. For examples, the North Central Texas Council of Governments uses the definition of the speeds over , and the Texas Department of Transportation and Oklahoma Department of Transportation use the speeds of or more. These agencies have a separate category for higher-speed rail which can be a wide range of speeds between and .