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简单输入输出模型与冲击波分析是研究交通瓶颈问题的两种常用方法,本文着重分析两者的一致性.在数学推导中考虑到达需求与流出率的变化时,两者对于排队和延误的预测结果是一致的.在不同的交通和边界条件下,两者在拥堵形成至消散的任意时刻所得排队长度,拥堵时间等结果均是一致的.以往认为两种方法不一致的研究忽略了一些与背景交通密切相关的基本因素.实例分析说明正是这些基本因素使得这两种分析方法在不同流量-密度关系下都具有一致性.
Simple input-output model and shock wave analysis are two common methods to study traffic bottleneck problem. This paper focuses on analyzing the consistency between the two. When considering the change of demand and outflow rate in the mathematical derivation, both the prediction results of queuing and delay Is consistent.With different traffic and boundary conditions, the queue length and congestion time obtained at any time from congestion formation to dissipation are consistent.The results of the inconsistencies between the two methods in the past have neglected some problems related to background traffic Closely Related Fundamental Factors Case Studies It is these basic factors that make these two analytical methods consistent under different flow-density relationships.