高速公路爬坡路段交通流运行特征及对交通安全影响机理

项目名称： 高速公路爬坡路段交通流运行特征及对交通安全影响机理

项目编号： No.51278102

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 项乔君

作者单位： 东南大学

项目金额： 80万元

中文摘要： 本项目以高速公路爬坡路段为研究对象，提出了爬坡路段影响区概念及其界定流程，从交通工程、交通流理论、系统工程、统计学、驾驶行为分析等角度出发，利用现场交通观测数据统计分析和交通流仿真分析相结合的方法，对高速公路爬坡路段的交通条件（交通量和交通组成）、道路条件（坡长、坡度、线形组合类型、爬坡车道的设置情况）对交通流运行特征的影响等进行定量分析，确定交通流运行特征随道路条件和交通条件的变化规律。在此基础上构建能够反映交通流运行特征的综合指标，并以此指标为依据，划分爬坡路段的交通流安全状态。建立爬坡路段道路条件和交通条件、交通流综合指标与交通冲突的统计分析模型，并结合爬坡路段交通事故分析，对模型进行了优化和有效性验证。最后针对不同的交通条件和安全等级，研究相应的优化设计参数，由此建立高速公路爬坡路段优化设

中文关键词： 高速公路；爬坡路段；交通安全评价；交通流特征；贝叶斯网络

英文摘要： The freeway climbing sections are the object of this study. The concept and determination method of climbing sections affected zone are proposed. From the perspective of traffic engineering, traffic flow theory, systems engineering, statistics, driver's driving behavior analysis, impacts of traffic conditions (traffic volume and traffic composition) and road conditions (slope length, slope gradient alignment combination form, with/without climbing lanes ) on traffic flow characteristics are analyzed quantitatively. The variation of operating speed, delay, acceleration, headway and time headway of freeway climbing sections under different road and traffic conditions are discussed through traffic data statistical analysis from field observation and traffic flow simulation analysis. On this basis, a comprehensive index to reflect the characteristics of traffic flow is build. Then a statistic analysis model is constructed to explain the relations among road conditions, traffic flow comprehensive index and traffic conflicts of freeway climbing sections. Furthermore, the model is optimized and validated by more field data. Finally, safety levels of traffic flow on freeway climbing sections are classified according to the comprehensive index of traffic flow characteristics. The parameters of optimization design for fre

英文关键词： Freeway；Climbing section；Traffic safety evaluation；Traffic flow characteristics；Bayesian network