Although the train is a relatively safe means of transportation, but the railway department has always put safety in the first place, they want to do better! We may have found a gap between the narrow point of the two wing tracks and the tip of the frog center when a wheel passes through the frog, which is the harmful space of the turnout. When the wheel passes through here, it may cause derailment due to the wrong rut grooves. This is where the rail is set. It forces the direction of the wheel to run. Nevertheless, this harmful space limits the speed of the train through the turnout, which is detrimental to the operation of the high-speed train. 

The fundamental way to solve the harmful space of turnout is, of course, to eliminate the harmful space. Since ordinary turnout can't be done, it is necessary to develop special turnout-moving center rail turnout. 

The main feature of the movable core track is that the frog core rail can be moved. When we are going to open a lane in one direction, the frog core track of the moving center track is closely attached to the wing track with the same opening direction and separated from the other wing track, so that the harmful space of the ordinary turnout does not exist. The practice has proved that the harmful space of turnout is eliminated, the running is more stable and the speed limit system of the turnout is smaller, so it is especially suitable for the high-speed train line to be used.