Now I'm on the high-speed rail. Do I find that the high-speed rail is not running at full speed on the road? What's the matter?
This seemingly simple problem is closely related to the complex situation of railway train operation. Railway lines crisscross the country, forming a huge 'chessboard', and trains are like pieces on the chessboard. Every piece of chess has its own rules, and every train must follow certain rules. It is up to the dispatcher to decide when the train starts, stops and how fast it should be, rather than the driver himself.
Obviously, the operation arrangement of railway trains is a very complicated work. In order to ensure that the train is both on time and safe, we need a huge organization to compile and command the whole process of train operation, which is usually called railway traffic dispatching. And this kind of dispatching work was carried out from the Ministry of Railways to the Railway Bureau and then to the station in different regions and levels, and the control of train speed was only a part of it. Now, let's take a look at the mystery.
First of all, how fast a high-speed train can run depends on the condition of the railway line. It's like driving the same car, on the highway or on the gravel road in the mountains, its speed is completely different. The distance of high-speed railway is long, and there are both straight and curve in the line. When the train enters the curve, in order to prevent the train from derailing or overturning, the train needs to reduce the speed. In the process of moving, the train may pass through bridges or tunnels. At this time, the line structure and environment will change, and the train will slow down. Even if you drive on straight roads, you will drive at different speeds due to different conditions of different foundations. It can be seen that these environmental factors on the line make it impossible for the train to run at the highest speed from beginning to end.
In fact, before the high-speed train starts, people will record the speed data of different sections in the whole process in the read-write electronic chip of the monitoring device. If the train exceeds the speed limit, the device will remind the driver and take measures automatically. Secondly, some sections of the line often need to be replaced or repaired temporarily, and the train has to slow down when passing through these places. Once the line ahead breaks down suddenly or the train ahead is late, the train has to slow down even more, sometimes it can only stop and wait.
In a high-speed railway line, it is often necessary to run multiple high-speed trains with different speeds, stops at different stations and arrives at different terminal stations, so as to improve the utilization rate of the line and meet the needs of different passengers. Therefore, it is necessary to scientifically arrange the running speed of all trains. In addition, it is inevitable for trains to avoid intersection, stop and control the speed, which also causes high speed One of the reasons why trains can't run all the way. No wonder the train's real-time speed is constantly changing on the display above both ends of the high-speed train. In fact, this speed change not only occurs in high-speed railway, but also in ordinary trains.