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基于高速公路交织段的概念,结合城市道路间断流运行特征及路侧指路信息对交织车辆的影响机理,提出城市道路交叉口进口道车流实际交织长度的确定方法。根据道路交通设计特征及驾驶员变道行为特征分别确定了城市道路进口道交织段的起讫点。选取上海市典型交叉口对车辆换道行为及微观行车特征进行视频观测,共获得159个有效样本,分析了车辆换道决策点在信息指示标志附近的分布规律,结果显示,换道决策点在信息指示标志附近呈正态分布。结合指路信息的影响改进了现有交织段通行能力计算模型,比较了该交叉口三个典型断面的通行能力:停车线断面、交织段断面、路段断面,并指出随指路信息位置变化时交织段通行能力的变化趋势,据此提出指路信息最佳设置位置。
Based on the concept of interlaced section of expressway and the influence mechanism of intermittent flow between urban roads and the influence of roadside guiding information on the interlaced vehicle, the method of determining the actual interlacing length of the imported road flow at urban road intersection is proposed. According to the characteristics of road traffic design and driver lane change behavior, the starting and ending points of the intersection of urban road inlet are respectively determined. A typical intersection in Shanghai is selected to observe the lane changing behavior and the micro-driving characteristics of the vehicle. A total of 159 valid samples are obtained. The distribution rule of the lane changing decision points in the vicinity of the information indicator is analyzed. The results show that the lane changing decision- Near the information indicator is a normal distribution. Combining with the influence of road information, the traffic capacity calculation model of the existing interlaced section is improved. The traffic capacity of three typical sections at the intersection is compared: the section of parking line, the section of interlaced section and the section of road section. Interweaving section of the capacity of the trend of change, which proposed the best way to set the location of information.