基于交通流运行特征的城市干线关键交叉口判别方法

摘要

The most direct way to alleviate urban road traffic congestion is the coordinated control of arterial road.However,the coordinated control needs to divide traffic control sub-area and the discrimination of critical intersections is the key procedure for the division.Based on the analysis of traffic flow characteristics,the indicators of intersection saturation,delay (LOS,level of service) and travel speed are selected to discriminate the critical intersection by using a quantitative method.By taking Liangqing Road of Wuxi City as the example,the proposed method is compared with the traditional method,which is based on the traffic engineers' experiences.The results show that the method is more scientific and rational with more accurate discrimination results.%缓解城市干线交通拥堵最直接的方法是进行干线协调控制,协调控制需要划分交通控制子区,而关键交叉口的判别是交通控制子区划分的关键.立足于交通流运行特征分析,选取交叉口饱和度、延误(服务水平)和行程车速等交通流运行指标,以无锡市梁清路为例,采取定量的方法,对干线关键交叉口进行判别.与传统的交通工程师凭经验判断,该方法更为科学合理,而且判别结果更为准确.