摘要
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 definition of expressway weaving area and the impact mechanism of features of interrupted flow and roadside guide information on weaving flow,a method for defining the actual weaving flow length of approach of road intersection is proposed. According to road traffic design features and driver＇s lane changing behavior,both ends of weaving area at approach of urban road intersection are determined. The distribution of lane changing points around guide signs is analysed based on the data of lane changing behavior and microscopic traffic characteristics（ 159 effective samples） collected at the typical intersections in Shanghai by video. The result shows that lane changing points around guide signs present normal distribution. Then,an optimized model to describe the impact of guide sign on the capacity at weaving area is proposed. Finally,the capacities of 3 typical sections（ stop-line section,weaving area section and road section） are compared,the trend of capacity varying with position of guide sign is presented,and the optimum position of guide sign is given accordingly.
出处
《公路交通科技》
CAS
CSCD
北大核心
2014年第9期108-114,共7页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(51178344)
关键词
交通工程
指路信息
模型优化
交织段
通行能力
traffic engineering
guide sign
model optimization
weaving area
capacity
