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
Amtrak's "Acela Express" (reaching ), Northeast Regional, Keystone Service, and certain MARC Penn Line express trains (the three services reaching ) are the only high-speed services in the country according to American standards, but elsewhere in the world "high speed" means services at or above .