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为了准确表征无信号交叉口的车流通行状况,提出了基于混杂Petri网的车流通行模型。该模型将交叉口车流分成不同的优先级别,分别计算每个级别通过交叉口的车流量和排队车辆数,以此表征它们在交叉口的通行状况,其中车流通行优先级别用离散Petri网表示,车流在交叉口的连续通行状况用时延Petri网表示。仿真结果表明:该模型能够比较有效地描述无信号交叉口车流通行的基本特性,满足城市路网建模的需要。
In order to accurately characterize traffic flow without signalized intersections, a traffic flow model based on hybrid Petri nets is proposed. The model divides the traffic flow at the intersection into different priority levels and calculates the traffic flow and the number of queued vehicles at each level through the intersections, respectively, to characterize their traffic flow at the intersection. The priority of the traffic flow is represented by discrete Petri nets The continuous traffic flow at the intersection is represented by the Petri net. The simulation results show that this model can describe the basic characteristics of traffic flow without signalized intersections more effectively and meet the needs of urban road network modeling.