Simulation Study on Capacity Expansion of Single-Track Railway Moving Block Considering Fixed Use of Departure Line

Aiming at the bottleneck problem of single-track railway transportation capacity, a mobile block simulation study suitable for single-track railway capacity expansion was carried out. A mobile block cellular automaton model considering the fixed use restrictions of the departure line was constructed to simulate the dynamic operation process of the train in a typical plateau railway section. Taking the Sangxiong to Lhasa West section of the Golam section of the Qinghai-Tibet Railway as an example, a train operation diagram simulation based on real line conditions was carried out. The study further explored the impact of factors such as departure intervals, passenger and freight train ratios, and freight station stop time on the utilization efficiency of intermediate stations, providing a feasible path and theoretical basis for improving the capacity of single-track railways and optimizing operation organization.