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快速路分流区事故率与交通密度的关系

吴勇,  刘新荣,  李蕊

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文章导航 > 西南交通大学学报  > 2014 >  27(1): 134-140.
吴勇, 刘新荣, 李蕊. 快速路分流区事故率与交通密度的关系[J]. 西南交通大学学报, 2014, 27(1): 134-140. doi: 10.3969/j.issn.0258-2724.2014.01.021
引用本文: 吴勇, 刘新荣, 李蕊. 快速路分流区事故率与交通密度的关系[J]. 西南交通大学学报, 2014, 27(1): 134-140. doi: 10.3969/j.issn.0258-2724.2014.01.021
shu
WU Yong, LIU Xinrong, LI Rui. Relationships between Crash Rate and Traffic Density at Urban Expressway Diverge Segments[J]. Journal of Southwest Jiaotong University, 2014, 27(1): 134-140. doi: 10.3969/j.issn.0258-2724.2014.01.021
Citation: WU Yong, LIU Xinrong, LI Rui. Relationships between Crash Rate and Traffic Density at Urban Expressway Diverge Segments[J]. Journal of Southwest Jiaotong University, 2014, 27(1): 134-140. doi: 10.3969/j.issn.0258-2724.2014.01.021
shu

快速路分流区事故率与交通密度的关系

doi: 10.3969/j.issn.0258-2724.2014.01.021
基金项目: 

国家自然科学基金资助项目（创新研究群体科学基金50921063）

详细信息
    通讯作者:

    刘新荣（1969-），男，教授，博士生导师，研究方向为城市地下空间开发与利用，E-mail：Liuxrong@126.com

Relationships between Crash Rate and Traffic Density at Urban Expressway Diverge Segments

    摘要
  • 摘要: 为寻求安全的交通流控制措施和道路几何构造，基于名古屋快速路网，对快速路分流区事故率特性进行了研究.以分流点为基点，将其上游450 m至下游300 m定义为分流区，对该区间事故率随交通密度的变化趋势进行分析，并对不同几何条件下事故率与交通流状态的关系进行了研究.结果表明，事故率在非饱和流状态随交通密度呈凹形变化趋势；在饱和流状态则随交通密度的增大而快速增大，事故率明显大于非饱和流状态下的事故率；在非饱和流状态下，多车事故是主要事故模式，事故率随密度逐渐增大；相对于直线段、分流区下游段和右分流模式，曲线段、分流区上游段和左分流模式事故率明显较大.

     

    Abstract: In order to seek safer methods of geometric design and traffic control strategies, the characteristics of crash rate (CR) varying with traffic flow conditions at diverge segments was studied based on Nagoya Urban Expressway network. Diverge segments were generally defined from 450 m upstream to 300 m downstream of ramp junctions. The relationships between CR and traffic flow density, as well as the tendencies of CR at diverge segments of different geometric features were analyzed. The results show that the CR in uncongested flow is convex downward to the traffic density. By contrast, the CR increases with the traffic density in congested flow and its value is much higher than in uncongested flow. In addition, in uncongested flow, multi-vehicle crash is the main crash mode and its RC is increasing with the traffic density. Compared to straight alignments, downstream sections of diverging area, and right-hand structures, significantly higher RC exist in curve alignments, upstream sections, and left-hand structures, respectively.

     

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出版历程
  • 收稿日期:  2012-06-09
  • 刊出日期:  2014-01-25

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