基于GPS车速数据驱动模型的高速公路极限匝道间距识别  

Determination of Ultimate Expressway Ramp Spacing Based on GPS Floating Car Speed Data Driven Model

作　　者：汪帆[1] 李岩[1,2] 刘建蓓 李元[1] 夏立品 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《公路交通科技》2016年第9期127-135,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51408049);中国博士后科学基金项目(2016M590914);陕西省自然科学基础研究计划项目(2015JQ5167);广东省交通运输厅科技项目(2014-02-012);中央高校基本科研业务费专项资金项目(310821161011;310821161017)

摘　　要：建立了基于GPS车速的数据驱动模型及间隙接受模型,以识别高速公路在极限状态下可采用的最小匝道间距。将高速公路匝道间距划分为加速影响区、减速影响区和交织换道区;建立GPS车速数据驱动模型识别车辆汇入后的加速影响范围和车辆驶出前的减速影响范围;根据可接受间隙理论建立极限管控条件下的交织换道区影响范围的识别模型;应用某市出租车在测试路段指定时段内的GPS时空车速数据分析。结果表明,加减速影响区的范围与车速线性相关。提出将多车道高速公路的直行车流与合、分流车流相分离,基于可接受间隙的模型测算结果表明交织换道区的距离不应小于639 m。在分流主线通过型交通流,交织换道区限速80 km/h,设置辅助车道时,二级服务水平下的极限匝道间距为872 m,考虑安全性,推荐设置为930 m以上。The ultimate expressway ramp spacing can be determined by the proposed GPS floating car speed data driven model and gap acceptance model. A ramp spacing is divided into acceleration influence area, deceleration influence area, and lane-changing weaving area. A GPS floating car speed data driven model is established to identify the acceleration and deceleration influence areas. And the influence area of weaving area under ultimate traffic management condition is established by using gap acceptance theory. The spatiotemporal GPS speed data of taxis of a city on the specific period on test road section are analysed. The result indicates that the lengths of acceleration and deceleration influence areas are linear to vehicle speed. It is proposed that to separate the throughput flow and diverted/merged flow on multi-lane expressway. The estimation of gap acceptance model indicates that the lengths of lane-changing weaving area should be longer than 639 m. When the throughput flow is separated, the speed of the weaving area is limited to 80 kin/h, and when an auxiliary lane is set, the ultimate expressway ramp spacing is 872 m under level of service II, and it is suggested to be longer than 930 m for the concern of safety.

关 键 词：交通工程 多车道高速公路极限匝道间距 数据驱动模型 间隙接受理论 GPS浮动车数据 高速公路管控 

分 类 号：U412.36[交通运输工程—道路与铁道工程]