Aiming at the characteristics of mixed running of multi-speed trains on PDLs, the movement rule of cellular automaton model for traffic flow is revised on the basis of relative research.

• 摘要针对客运专线多速列车共线运行的特点，在有关研究的基础上，修改了交通流元胞自动机模型的运行规则，提出一种用于求解双线准移动闭塞区间多速运行系统的元胞自动机模型。