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 China
Higher-speed express train service allowed more trains to share the tracks and improved rail transport capacity. But high-speed trains often have to share tracks with slower, heavy freight trains—in some cases with as little as 5 minutes headway. To attain higher speeds and transport capacity, planners began to propose a passenger-dedicated HSR network on a grand scale. Initiated by MOR's 2004 "Mid-to-Long Term Railway Network Plan", a national grid composed of eight high-speed rail corridors, four running north-south and four going east-west, was to be constructed. The envisioned network, together with upgraded existing lines, would total in length. Most of the new lines follow the routes of existing trunk lines and are designated for passenger travel only. They became known as passenger-designated lines (PDLs). Several sections of the national grid, especially along the southeast coastal corridor, were built to link cities that had no previous rail connections. Those sections will carry a mix of passenger and freight. High-speed trains on PDLs can generally reach . On mixed-use HSR lines, passenger train service can attain peak speeds of . The earliest PDLs built were sections of the corridors that connected large cities in the same region. On April 19, 2008, Hefei–Nanjing PDL in the East opened with a top-speed of . On August 1, 2008, the Beijing–Tianjin Intercity Railway opened in time for the 2008 Summer Olympics. This line between northern China’s two largest cities, was the first in the country to accommodate commercial trains with top speed of and featured the CRH2C and CRH3C train sets. This ambitious national grid project was planned to be built by 2020, but the government's stimulus has expedited time-tables considerably for many of the lines.