远引掉头方式下中央分隔带开口间距  

Median opening space under the condition of indirect left turn

作　　者：张宁[1] 陈恺[2] 何铁军[1] 黄卫[1] 

机构地区：[1]东南大学教育部ITS工程研究中心,江苏南京210096 [2]四川省公路规划勘察设计研究院,四川成都610041

出　　处：《长安大学学报（自然科学版）》2009年第1期78-82,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50422283);江苏省交通科技项目(05R26)

摘　　要：确定中央分隔带开口间距,是路口禁左而在下游路段掉头时需要研究的关键问题。借鉴高速公路的相关交织理论,建立了远引掉头方式下中央分隔带开口间距模型,并利用微观仿真法进行评价分析。仿真结果表明:根据建立的间距模型设置远引掉头,相比直接左转能缩短延误约4.6 s;在相邻路口间距较远、道路设计车速不高的情形下,改善效果尤为明显。Median opening space is a key problem when vehicles＇ left turn is forbidden and indirect turn must be done at downstream section. Using freeway weaving theory for reference, the median opening spacing model of indirect left turn is developed, and micro-simulation is carried out. It is found that the average delay of indirect left turn with the spacing model is reduced by 4.6 s compared with the direct left turn, and the effect is remarkable when the distance of adjacent intersection is long and the road design speed is not fast. 5 tabs, 4 figs, 14 refs.

关 键 词：交通工程 远引掉头 中央分隔带开口 微观仿真 

分 类 号：U491[交通运输工程—交通运输规划与管理]