高速公路出口前置指示标志安全距离计算模型  

A Model for Calculating Advance Guide Sign's Reasonable Setting Location at Expressway Exit

作　　者：崔洪军[1] 马新卫 李霞[1] 李霖[1] 李海南[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401

出　　处：《公路交通科技》2016年第4期120-126,共7页Journal of Highway and Transportation Research and Development

基　　金：河北省自然科学基金项目(E2013202228);河北省交通运输厅科技计划项目(R070245)

摘　　要：为了确立安全合理的高速公路出口前置指示标志(AGS)设置位置,建立了AGS安全设置距离计算模型。将机动车驶出高速公路的行为过程分为反应期、变道期、减速期,并重点研究了AGS安全识别距离与变道期机动车行驶距离。通过建立车辆间隔距离模型与分析调查数据,研究了相邻车道符合变道要求的最小车头间距。运用概率统计与排队论方法分析特定路段的车辆分布,并引入变道成功率,全面考虑驾驶员驾驶特征,最终依据所建计算模型得出不同道路情况下AGS的安全设置距离。通过实例计算得出双向六车道与双向八车道AGS设置安全距离分别为870 m与1 620 m,计算结果与我国现行相关规范中数值有一定程度上的差异。结果表明:不同道路情况计算得出的AGS安全设置距离不同,我国现行相关规范有待改善。In order to determine the reasonable setting location of AGS at expressway exit,the calculation model of AGS＇s safety setting distance is established. The behavior of vehicle running out of expressway is divided into reaction period,lane-changing period anddeceleration period,and the safety identification distance of AGS and the lane-changing distance are focused on. With the establishment of the vehicle headway model and an investigation,the minimum vehicle headway in adjacent lane which makes it possible to change lane is analyzed. The distribution of the vehicles on special section is analyzed by probability theory and queuing theory. Then, with introducing the lane-changing success rate and fully considering the properties of drivers＇ behavior,the AGS＇s safety setting distances in different road situations are obtained at last. The actual example calculation shows the AGS safety setting distances of two-way six-lane and two-way eight-lane are 870 m and 1 620 m respectively,which are different in some degree from the current relevant specification of China. The result shows that the calculated AGS＇s safety setting distances in various road situations are different,the current related specification of China need to be modified.

关 键 词：交通工程 道路交通安全 计算模型 前置指示标志 合理设置距离 变道成功率 最小可变道车头间距 

分 类 号：U491.52[交通运输工程—交通运输规划与管理]