摘要
以某交叉口为例,研究左转车道位置布局变化对交叉口交通流特性的影响。首先对现有交叉口的交通量、信控周期、驶入车速、线形等进行调查,然后分析左转车道位置改变后交叉口通行能力的影响情况[1]。采用校正流率在Vissim中模拟不同左转弯交通流比例、不同交通负荷及不同大型车比例情况下,交叉口的通行效率改变情况。最后,运用交通冲突法分析改变车道布局后交叉口的安全性。研究显示:改变左转车道的水平位置不会影响交叉口的通行能力和安全性,当改变左转车辆比例时对交叉口通行效率没有影响;当改变交叉口交通负荷或者左转大型车辆比例改变时,改变左转车道水平位置会对交叉口通行效率有所提高。本研究的主要目的是提高左转车道中大型车量相对较多的交叉口服务水平,通过简单的车道位置变换使交叉口可以更好地发挥集散交通流功能。
An intersection is taken as an example to study the influence of left-turn lane location layout change on traffic flow characteristics.The traffic survey was focused on traffic volume,signal cycle time,driving speed and line shape of the current intersections.The influence of traffic capacity of the intersection was analyzed under the condition of different layout of the left turn lane.Then,based on the rectified flow rate,three cases were simulated in Vissim：different proportion of left turn traffic flow,different proportion of traffic loading and different proportion of large vehicles.At last,intersection safety evaluation was made by using traffic conflict method.The conclusion can be drawn as following：The traffic capacity and safety of the intersection will not be affected if the horizontal position of the left turn lane is changed.It will have no effect on the traffic efficiency at the intersection if the ratio of the left turn vehicle is changed.The traffic efficiency of the intersection will be improved by changing the horizontal position of the left turn lane when the traffic loading or proportion of left turn traffic flow of big car are changed.The main purpose of the research is to improve the service level of the intersections which have great number of medium and large vehicles in the left-turn lanes.Through simple transformation of the lane position to make the intersections perform the function of collecting and distributing traffic flow better.
作者
米荣伟
王文强
赵琴
盛玉刚
MI Rongwei, WANG Wenqiang, ZHAO Qin, SHENG Yugang(College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing 210037,China)
出处
《交通科技与经济》
2018年第4期33-39,共7页
Technology & Economy in Areas of Communications
基金
江苏省2017年大学生创新训练计划项目重点项目(201710298041Z)
江苏高校品牌专业建设工程项目(PPZY2015A063)
