The invention relates to the technical field of traffic information and control, and particularly discloses a method for predicting propagation of influence of emergencies in expressway network. The method the following steps: S1, segmenting the expressway network; S2, establishing a speed density model and a flow density model including a heavy vehicle mixing rate, and determining boundary conditions; S3, acquiring a basic condition of an emergency point; S4, calculating the propagation speed of the emergency road section; S5, judging whether the accommodating capacity of the upstream node area overflows or not; S6, calculating the influence propagation speed of the upstream converging ramp section; S7, judging influence propagation of a first node area; S8, judging whether the intersected basic road sections are blocked or not; S9, calculating the influence propagation speed of the upstream interleaving area; S10, determining the influence propagation of the upstream node area of the interleaving area; and S11, judging whether an upstream basic road section is blocked or not. The scheme is used for solving the problems that in the prior art, expressway network propagation prediction has defects under emergencies and the prediction result is not high in accuracy.
本发明涉及交通信息及控制技术领域,具体公开了一种突发事件影响在高速公路网中的传播预测方法,包括如下步骤:S1、对高速公路网进行分段;S2、建立包括重车混入率的速度密度模型和流量密度模型并确立边界条件;S3、获取突发事件点的基本情况;S4、计算突发事发路段的传播速度;S5、判断上游节点区域容纳能力是否会溢出;S6、上游合流匝道段影响传播速度计算;S7、第一个节点区域影响传播判定;S8、判断相交基本路段是否产生堵停;S9、上游交织区影响传播速度计算;S10、交织区上游的节点区域影响传播判定;S11、判断上游基本路段是否产生堵停。本方案用以解决现有技术中突发事件下高速公路网传播预测存在缺陷和预测结果准确率不高的问题。
Method for predicting propagation of influence of emergencies in expressway network
一种突发事件影响在高速公路网中的传播预测方法
2021-09-03
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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