Petri网络在无控制交叉口冲突分析中的应用

为减少无控交叉口的停车延误,提高通行效率,根据Petri模型的基本原理,分析2/2相交的主路优先通行交叉口车辆运行过程HSPN模型,提出基于HSPN模型的交叉口延误公式,最后利用TSIS仿真软件,对模型进行仿真验证。依据HSPN中的输入和输出关联映射,利用间隙接受理论与车头时距M3分布模型,计算两向停车条件下的无控交叉口次路车流停车延误。结果表明,通过分析系统组织结构和动态行为,对运行过程建模,有利于分析无控交叉口的停车让行冲突规律。

Application of Petri Network in Conflict Analysis of Uncontrolled Intersections

In order to reduce the stop delay at uncontrolled intersections and increase the traffic efficiency,the HSPN model of vehicle running process at 2/2 intersectant intersections with the preferential passage of main road was analysed according to the fundamental principles of Petri Model.The delay formula at intersections was concluded based on the HSPN model,which was verified with the TSIS simulation software.According to the associative mapping of the input and output in the model,the stop delay of secondary traffic flow at uncontrolled intersections with the preferential passage of main road was calculated with the gap acceptance theory and the M3 distribution model of headway.The result indicated that through the analysis of system framework and dynamic behaviors,the running process model was built,which was helpful to illuminate the conflict rules of stop delay at uncontrolled intersections.