Examination of Speed Control for Reducing Warning Time in Level-Crossing Control for CBTC System

Abstract

Some level-crossing control methods have been proposed as a subsystem of the Communications-Based Train Control (CBTC) system. In this method, the warning starts according to the forecasted time when a train reaches the level crossing; the forecasted time is calculated on the basis of the speed and detected position of the train. Therefore, we have analytically clarified the quantitative relations among the train's position at the start of warning, train-running speed, and maximum train speed, which have not yet been shown. In this paper, we propose a speed-control method for reducing the warning time according to the train-speed characteristics in the train level-crossing control for the CBTC system. In addition, this method has been proposed for reducing the warning time when a train comes from the opposite direction according to the conventional level-crossing control. Therefore, we also propose the application of the speed-control method to the case when a train comes from the opposite direction. In addition, we show the effect of the reduction in the warning time by applying this method for speed control without train delay.