Generally known as ATC system, it i

Generally known as ATC system, it is mainly used in rail transit engineering under 80km/h. ATC system is mainly composed of four subsystems: ATP, ATO, interlock with training computer and ATS.According to the basic principle of moving block, the front train on the line transmits the actual position of the vehicle through the ATP vehicle-mounted equipment to the mobile block processor beside the track through the communication system, and processes this message into the average transport permission of the subsequent train to send the ATP vehicle-mounted equipment of the subsequent train. The "safe distance" between the following train and the train in front is always maintained. The safe distance refers to the fixed distance between the target parking point of the following vehicle and the rear end of the vehicle in front. This distance was chosen with due regard to the fact that in a range of worst-case scenarios the train can still be safely separated.