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以简化的动力波理论为基础,假设路段上只有2种流量状态:一个是前向波;另一个是后向波。根据路段出入口的累计车辆数以及路段波速,计算可能的路段出入口流量,并以此为基础,进一步计算路段的实际出入口流量,给出了一个破坏排队条件下的离散时间动态网络装载模型。仿真试验结果表明:破坏排队模型能够跟踪由于路段拥挤导致的破坏排队现象,进一步对比了点排队与物理排队的动态网络装载结果的差异;在非拥挤状况下,2种模型类似,而在拥挤状况下,破坏排队模型能够给出更加真实的结果。
Based on the simplified theory of dynamic waves, it is assumed that there are only two flow states on the road: one is the forward wave and the other is the backward wave. Based on the accumulated number of vehicles at the entrances and exits of the road sections and the wave speed of the road sections, the possible traffic flows at the entrances and exits of the road sections are calculated. Based on this, the actual traffic flows at the entrances and exits of the road sections are further calculated and a dynamic network load model under discrete queuing conditions is given. The simulation results show that the model can track the queue failure caused by traffic congestion and further contrast the dynamic network loading results between point queuing and physical queuing. Under non-congestion conditions, the two models are similar, but in crowded conditions Under the destruction of queuing model can give more realistic results.