### Study on characteristics of traffic flow of trains and operational delay in speed-limited section

XU Dejie, MAO Baohua, RONG Yaping

1. MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China
• Online:2015-03-01 Published:2015-04-08

### 限速区段列车流特性及运行延误研究

1. 北京交通大学 城市交通复杂系统理论与技术教育部重点实验室，北京100044

Abstract: By analyzing the operational characteristics of trains in speed-limited section, it proposes a cellular automaton model for train movements in the four-aspect fixed-block system. The operational properties and delay laws of traffic flow of mixed trains are investigated in this paper, and the reasons causing operational delay are also analyzed. The results show that when the passenger and freight trains operate on the same railway, the reasons which cause the delay are speed-limit and inhibiting effect of freight trains to passenger trains, and the delay time increases with the length grow of speed-limited section. The inhibiting effect decreases with the increasing of train departure interval, and once it is greater than a critical value, the main reason inducing train delay is only speed-limit of slowdown section. When the train departure interval maintains a constant value, the average delay time of trains will form a “arch” with the increasing proportion of passenger and freight trains, and when the proportion ranges from 0.55~0.65, the average delay time reaches to maximum.