Judgment of train operation conflict and its implementation for high-speed railway

In order to improve railway traffic control level and ensure railway operation safety, the judgment methods for 7 types of train operation conflicts were studied, including time interval conflicts between two adjacent trains at stations, conflicts of section occupation, utilization conflict of arrival and departure track, conflicts between train running and maintenance work, conflicts between train running and passenger transfer time, connecting time conflicts of electric multiple units (EMUs), and time conflicts of cross-line trains. According to the judging rules of high-speed train operation conflicts, the calculation criteria for temporal relation of event time slice was established using the theory of time topology matrix, and the time logic checking of train events was realized. The job of train operation conflict judging is divided into two parts, i.e., the utilization conflict of arrival and departure tracks and the other types of conflicts, for high-speed rail system. In addition, the judgment methodology and processes were described. A application instance shows that the method that combines the conflict judging rules with the time topology matrix can successfully judge the various types of real-time train operation conflicts and meet the demands of high-speed railway traffic control.