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为向交通管理、道路改造、交通出行等提供服务,以定点检测线圈数据为基础,根据交通参数关系拟合后得到拥挤阈值,对交通参数时空变化图进行瓶颈位置识别,再使用“变形累计曲线法”进一步研究瓶颈附近交通拥挤特征。此外,文章对“变形累计曲线法”中关键问题进行了讨论,得到了曲线变化所揭示的意义和背景参数值的确定方法。以上海市南北高架东侧部分路段为例,对早上6∶00—12∶30瓶颈附近路段的拥挤状况进行了分析,确定了瓶颈位置并得到了瓶颈处拥挤的开始时间、结束时间和拥挤持续时间。
In order to provide traffic management, road reconstruction, traffic and other services to the fixed-point detection of coil data based on traffic parameters obtained after fitting the threshold of congestion, the traffic parameters of space-time changes in the bottleneck position identification, and then use the “deformation cumulative Curve Method ”to further study the characteristics of traffic congestion near the bottleneck. In addition, the article discusses the key problems in “Cumulative Curve Deformation Method”, and obtains the meaning of the curve change and the method of determining the background parameter value. Taking the sections of eastern part of the north and south elevation of Shanghai as an example, this paper analyzes the congestion of road sections near the bottleneck at 6: 00-12: 30 in the morning, determines the bottleneck position and obtains the start time, the end time and the congestion time.