城市道路交叉口可变导向车道时空资源优化设计

摘要城市交通系统是城市发展的重要组成部分，而交叉口在城市交通系统中又发挥着重要作用，它是路网的节点。可变导向车道作为一种交通管理技术，能够有效缓解时空资源利用不足和交叉口的拥堵问题。本文通过对带有可变导向车道的交叉口进行分析，达到提高交叉口运行效率的目的。本研究以重庆市南岸区学府大道-兰花路交叉口为例展开研究，通过查阅资料和文献，了解可变导向车道的概念、特点以及设置可变导向车道的必要性，了解适合设置可变导向车道的交叉口类型和条件。从可变导向车道的设计原则和评价指标出发，对交叉口现状调查，查明交叉口存在的问题并给出解决方案。对交叉口转向交通流不均衡特性及不均衡程度等方面进行交通特征分析，同时对交叉口进行交通渠化和信号配时优化设计。渠化通过设计交通标线来实现优化道路交通流和提高道路安全的效果，而信号配时优化是使用Webster法，了解这种方法是否适用于当前交叉口，，来实现信号配时优化，最后通过VISSIM仿真来进行验证方案的可行性。关键词：交叉口：时空资源优化；可变导向车道；VISSIM仿真Optimal design of space-time resources for variable directional lanesat urban road intersectionsAbstractThe urban transportation system is an important part of urban development,and theintersection plays an important role in the urban transportation system,which is the node ofthe road network.As a traffic management technology,variable directional lanes caneffectively alleviate the problems of underutilization of space-time resources and congestionat intersections.In this paper,the purpose of improving the operational efficiency ofintersections is achieved through the analysis of intersections with variable directional lanes.This study takes the intersection of Xuefu Avenue and Lanhua Road in Nan'an District,Chongqing as an example.By consulting information and literature,we can understand theconcept and characteristics of variable directional lanes and the necessity of setting variabledirectional lanes,and understand the suitable variable directional lanes.The intersection typeand condition of the lane.Starting from the design principles and evaluation indicators ofvariable directional lanes,the current situation of the intersection is investigated,theproblems existing at the intersection are identified and solutions are given.Carry out trafficcharacteristics analysis on the unbalanced characteristics and unbalanced degree of turningtraffic flow at the intersection,and optimize the design of traffic channelization and signaltiming at the intersection.Channelization achieves the effect of optimizing road traffic flowand improving road safety by designing traffic markings,and signal timing optimization is tofirst analyze the three commonly used timing methods to understand whether they areapplicable to the current intersection,and find the appropriate method to realize signaltiming optimization,and finally verify the feasibility of the scheme through VISSIMsimulationKey Words:intersection;space-time resource optimization;variable directional lane;VISSIM simulation目录摘要......Abstract..1绪论1.1研究背景和意义1.2国内外研究概况1.2.1国内研究现状21.2.2国外研究现状21.2.3主要问题和发展趋势31.3主要研究内容和技术路线1.3.1主要研究内容.31.3.2技术路线…51.4本章小结.…62可变导向车道基本概念….72.1可变导向车道的概念、特点和必要性.72.1.1可变导向车道的定义….72.1.2可变导向车道的分类.…P2.1.3可变导向车道的优缺点….82.1.4设置可变导向车道的必要性.92.2适合设置可变导向车道的交叉口类型和条件102.3可变导向车道的设计原则和评价方法102.3.1可变导向车道的设计原则102.3.2可变导向车道的评价方法112.4本章小结123交叉口现状调查和交通特征分析............m133.1研究对象133.2几何特征调查….143.3交通参数调查….163.3.1车流量调查163.3.2信号相位调查183.3交通问题调查.19Ⅲ