What is the difference between high speed railroad and common railroad?

High-speed rail is the meaning of high-speed railroad, "high-speed railroad" is defined as: the new construction of more than 250 km/h, speed upgrading of more than 200 kilometers per hour of the railroad system. \x0d\\\\\x0d\\so, China's revamped Beijing-Guangzhou, Beijing-Shanghai, Beijing-Harbin line and other trunk lines, the speed of 200 kilometers per hour or more sections, counting high-speed railroads. \x0d\and later the new Beijing-Tianjin intercity high-speed railroad, Wuhan-Guangzhou high-speed railroad, as well as the construction of the Beijing-Shanghai high-speed railroad, Harbin-Dalian high-speed railroad, Beijing-Shenyang high-speed railroad, etc. is the real 350 kilometers per hour of high-speed railroads. \x0d\\ High-speed railroads and ordinary railroads is the difference between \x0d\1, high-speed railroads are very smooth to ensure the safety and comfort of driving, high-speed railroads are seamless steel rails, and speed of 300 kilometers per hour or more high-speed railroads are used in the ballastless track, that is, there is no stone of the whole type of roadbed to ensure smoothness. \x0d\2, high-speed railroads have fewer curves, large radius of curves, and the turnouts are movable center high-speed turnouts. \x0d\3, a large number of elevated bridges and tunnels. To ensure smoothness and shorten the distance. \x0d\4, the contact network of high-speed railroads, that is, the wires on the top of the train are suspended in a different way from ordinary railroads, to ensure the contact stability and durability of high-speed rolling stock. \x0d\5, the signal control system of high-speed railroads is more advanced than that of ordinary railroads, because of the high density of departures and the speed of trains, the safety must be high. \x0d\\\\\x0d\but to emphasize: high-speed railroads and ordinary railroads are compatible, at least in our country to ensure compatibility, is to be able to *** use. Specifically: \x0d\\\x0d\\ High-speed railroads with a speed of 350 per hour, operating high-speed rolling stock with a speed of 350 per hour (CRH3, CRH2C) and fast rolling stock with a speed of 250 per hour (CRH1, CRH2a, CRH2e, CRH5), such as the Beijing-Tianjin Intercity and Wuhan-Guangzhou high-speed railways, as well as the Beijing-Shanghai and Beijing-Wuxi in the future. \x0d\ High-speed railroads with a speed of 250 mph, operating fast rolling stock and ordinary trains with a speed of 250 mph, including freight trains, e.g., Shi-Tai High-speed Railway, He-Wu High-speed Railway. \x0d\\ 200 km/h speed upgraded general speed railroads, operating 250 km/h fast rolling stock (will be less and less) and ordinary trains, as well as freight trains. For example, the existing Beijing-Guangzhou and Beijing-Shanghai lines. \x0d\ The general-speed railroads with speeds below 200 kilometers per hour, operating ordinary trains, as well as freight trains. For example, most of the branch lines in China.