城市双车道错位交叉口合理间距分析  

Reasonable spacing of city two-lane misaligned intersection

作　　者：陈林圻 周磊 潘兵宏[1] CHEN Linqi;ZHOU Lei;PAN Binghong(School of Highway, Chang’an University, Xi’an 710018, China;Shaanxi Provincial Transport Planning Design and Research Institute, Xi’an 710065, China)

机构地区：[1]长安大学公路学院,西安710018 [2]陕西省交通规划设计研究院,西安710065

出　　处：《中国科技论文》2020年第8期906-914,共9页China Sciencepaper

基　　金：河北省民生科技专项(19275601D)。

摘　　要：针对城市内主支路相互交叉的错位交叉口严重影响城市道路网运输效率与车辆运行安全的问题,以双T型错位交叉口为研究对象,研究其在不同设计速度下的节点间距值。首先,明确了错位交叉节点间距定义,考虑等待可插入间隙、换道条件判断、变换车道、减速停车及排队等候这5个相关因素,据此建立错位交叉口节点间距计算模型,计算不同设计速度下的节点间距值。其次,以翠华路错位交叉口路段为例,建立Vissim仿真模型,选取平均车辆延误、平均停车次数、平均停车时间及冲突次数为指标,通过Vissim仿真试验对比间距改进前后错位交叉口内交通流的运行特性。最后,通过敏感性分析,对比不同交通量负荷度水平下车辆延误、停车次数及停车时间的变化趋势。结果表明,由所建立的节点间距计算模型计算所得的间距值能够满足错位交叉口路段车辆安全顺畅运行的要求。Aiming at the problem that the misaligned intersection of the main and branch roads in city seriously affects the transportation efficiency and vehicle safety of the urban road network,this paper takes the double T-shaped misaligned intersection as the research object,and studies its node spacing value under different design speeds.Firstly,the definition of the misaligned intersection node spacing was defined,and five related factors such as waiting for the insertable gap,judgement of the lane change condition,changing the lane,decelerating and queue waiting in line were considered.The calculation model of the node spacing of the misaligned intersections was established,and the node spacing values at different design speeds were calculated.Secondly,the Vissim simulation model was established by taking the misaligned intersection of Cuihua Road.The average vehicle delay,average number of stops,average stop time and number of collisions were selected as indicators.The Vissim simulation test was used to compare the operational characteristics of traffic flow in the misaligned intersection before and after the improvement of the spacing.Finally,through the sensitivity analysis,the trends of vehicle delay,number of stops and parking time under different traffic load levels were compared.The results show that the interval value calculated by the node spacing calculation model established in the study can meet the requirements of safe and smooth operation of vehicles at the intersection section.

关 键 词：交通工程 节点间距 节点间距计算模型 错位平面交叉口 

分 类 号：U412.37[交通运输工程—道路与铁道工程]