城市快速路合流区汇入角度对合流区通行能力的影响  

Effect of Merge Angle on Capacity of Urban Expressway Merge Area

作　　者：魏中华[1] 李志[1] 周晨静[1] 邱实[1] 徐天宇[1] 

机构地区：[1]北京工业大学北京城市交通协同创新中心,北京100124

出　　处：《公路交通科技》2017年第5期116-121,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金青年科学基金项目(51208008;11106003201602);国家重点基础研究发展计划(九七三)计划项目(2012CB723303)

摘　　要：为研究城市快速路合流区汇入角度对合流区通行能力的影响,通过卫星地图查找北京环路所有合流区,确定其合流区类型。利用Auto CAD软件对合流区汇入角度进行测量,根据汇入角度所占比例特点分别选取汇入角度为3°,5°,8°,13°,18°合流区,以现场实测数据为依据,分别统计在不同类型合流区不同位置以及流量条件下,速度和流量的变化规律,并用线性回归分析合流区通行能力。结论表明,合流区上游通行能力大小受合流区汇入角度的影响,下游通行能力值与合流区汇入角度无明显相关关系,加速车道的存在也会对合流区通行能力产生影响。In order to investigate the impact of merge angle on capacity of urban expressway merge area,the types of merge areas are determined according to the satellite map to find out all the merge areas on the ring roads in Beijing. The merge angle is measured using Auto CAD software. Based on the distributed characteristic of the merge angles,the merge areas with 3°,5°,8°,13°,and 18° are selected. Based on the actual measured data,the changing regularities between speed and volume under the condition of different positions and traffic volumes of different merge area types are counted respectively,and the capacity of the merge area is analyzed by linear regression analysis. The result shows that（ 1） although the capacity of upstream is influenced by merge angle of merge area,there is not significant correlation between capacity of downstream and merge angle;（ 2） the capacity of merge area is impacted by acceleration lanes.

关 键 词：交通工程 通行能力 线性回归 合流区 汇入角度 

分 类 号：U491.1[交通运输工程—交通运输规划与管理]