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高架道路上的交织区时常成为交通瓶颈.以Nagel和Schreckenberg提出的NS元胞自动机交通流模型为基础,考虑到换道因素,对高架路主线为单车道时的交织区路段进行了数值模拟和分析.结果表明:当交通流稀疏时,车流的交织行为对系统影响不大,即使加大交织区长度,整个系统的交通流参数也变化不大;当交通流拥挤时,交织行为会对系统产生不良影响,此时加大交织区长度,可以改善整个系统的交通流状况.模拟结果显示,交织区长度并非越大越好,工程设计中选取一个适宜的中间值,整个系统就可以获得很好的运行效果.
The weaving area on the elevated road often becomes the traffic bottleneck.Based on the NS cellular automatical traffic flow model proposed by Nagel and Schreckenberg, considering the lane changing factors, The results show that when the traffic flow is sparse, the interweaving behavior of the traffic flow has little effect on the system, and even if the length of the interwoven zone is increased, the traffic flow parameters of the whole system also change little. When the traffic flow is crowded, the interweaving behavior will affect the system The length of the weaving area is increased, which can improve the traffic flow of the whole system.The simulation results show that the length of the weaving area is not as good as possible, and the middle of the engineering design can select a suitable middle value, and the whole system can be well obtained The running effect.