山区低指标复杂线形公路行驶安全性检验方法研究
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重庆交通大学交通运输学院 重庆

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U412.3

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重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX1516);重庆市高校创新研究群体项目(CXQT21022)


Research on Driving Safety Inspection Method of Highway with Low Index and Complex Alignment in Mountainous Area
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1.School of Traffic &2.Transportation, Chongqing Jiaotong University

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    摘要:

    现行安全性评价规范缺乏针对四级、等外公路等低指标公路的线形设计安全性的指导,为此提出了一种检验山区低指标复杂线形公路行驶安全性的方法:基于CarSIM/TruckSIM仿真软件平台搭建“人-车-路”系统仿真,选取代表性车型,以实车行驶数据为仿真参数设置依据开展车辆虚拟行驶试验,利用速度、横向稳定性、驾驶操纵性、速度调控等四类指标,分析被检公路的公路几何设计符合性、速度协调性、驾驶操纵负荷、事故易发路段甄别、连续纵坡路段安全性。通过运行与实车试验相似的虚拟仿真行驶实验验证了“人-车-路”仿真方法的可行性,并且选取了1条四级公路、1条等外公路为实例,结果表明,该方法能有效检验出公路线形设计组合指标超低限的、不协调的线形单元,驾驶操纵负荷较大、均衡性较差的路段,危险路段及对应的车辆事故形态和临界安全速度,重型载重货车通过回头曲线越出行车道的位置及越出宽度;进而可以根据危险路段的行驶/事故状况提出靶向性的几何参数改善措施,增加车辆在山区低指标复杂线形公路行驶的通过性和稳定性,最终达到提高山区低指标公路的线形设计质量和行驶安全性的目的。

    Abstract:

    The current safety evaluation standards lack guidance on the alignment design specific to lower-grade highways, such as four-lane and non-standard highways. To address this issue, a method for assessing the driving safety of mountainous highways with low index and complex alignment is proposed. The method involves building a human-vehicle-road system simulation using the CarSIM/TruckSIM simulation software platform, selecting representative car models, and using realing vehicle driving data as simulation parameters to carry out virtual vehicle driving tests. Four categories of indicators, including speed, lateral stability, driver handling, and speed regulation, are used to examine and analyze the compliance of the tested highway"s geometric design, speed coordination, driving operation load, identification of accident-prone sections, and safety of continuous uphill sections. The feasibility of the "human-vehicle-road" simulation method is verified by running virtual simulation driving tests similar to the real-vehicle test, and one four-lane highway and one non-standard highway are selected as examples. The results demonstrate that this method can effectively identify alignment design combinations that are below the limit and inconsistent, as well as road sections with high driver handling loads and poor balance. It can also identify dangerous road sections, corresponding vehicle accident patterns, critical safety speeds, and positions and widths where heavy-duty trucks deviate from the travel lane when passing through hairpin curves. Based on the driving/accident conditions of dangerous road sections, targeted geometric parameter improvement measures can be proposed to enhance the trafficability and stability of vehicles on ordinary mountainous highways with low index and complex alignment, ultimately improving the quality of alignment design and driving safety for low-index highways in mountainous areas.

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李诗佳,徐进. 山区低指标复杂线形公路行驶安全性检验方法研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-12-15
  • 最后修改日期:2024-06-19
  • 录用日期:2024-07-09
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