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 India
One of the first proposals to introduce high-speed trains in India was mooted in the mid-1980s by then Railway Minister Madhavrao Scindia. A high-speed rail line between Delhi and Kanpur via Agra was proposed. An internal study found the proposal to not be viable at that time due to the high cost of construction and the inability of passengers to bear much higher fares than those for normal trains. The railways instead introduced Shatabdi trains which ran at 130 km/h.