高速公路施工区车流跟驰追尾冲突风险

发布时间：2018-04-28 21:33

本文选题：交通工程 + 施工区　；参考：《长安大学学报(自然科学版)》2017年02期

【摘要】：为了在传统交通冲突评价方法不适用于施工区的情况下,定量研究高速公路施工区警告区、上游过渡区、缓冲区和作业区的车辆跟驰追尾冲突风险程度,以车辆减速率为中间变量,运用碰撞时间函数TTC和驾驶人特性之间的关系,研究高速公路施工区车辆跟驰追尾冲突风险阈值;根据车辆不同减速率对应的驾驶人生理和心理反应程度,建立碰撞时间函数、车辆减速率与驾驶人特性之间的关系模型,提出基于驾驶人特性的高速公路施工区跟驰追尾冲突风险阈值的确定方法;根据减速率的划分范围和减速率与碰撞时间函数的关系,将高速公路施工区各区段的车辆跟驰追尾风险程度划分为安全、较为安全、一般冲突和严重冲突4个风险等级,并以西安-临潼高速公路改扩建施工区为应用实例,采用实际调查数据评价高速公路施工区各区段的冲突风险程度。研究结果表明:警告区的跟驰追尾冲突风险程度最高,其冲突风险阈值、冲突点数和冲突比例都明显高于其他区段;对于同一区段,交通量越大,跟驰追尾冲突的风险性越高。该研究结果可对高速公路施工区各区段产生跟驰追尾冲突的可能性进行预判,防止交通事故的发生,同时还可对交通安全水平进行定量化判别。
[Abstract]:In order to quantitatively study the risk of vehicle trailing conflict in expressway construction area warning area, upstream transition area, buffer zone and operation area, the traditional traffic conflict evaluation method is not applicable to the construction area. Taking the vehicle deceleration rate as the intermediate variable, the relationship between the collision time function (TTC) and the driver's characteristics is used to study the risk threshold of the collision with the rear end of the vehicle in the expressway construction area. According to the physiological and psychological reaction degree of the driver with different deceleration rate, the impact time function and the relationship model between the vehicle deceleration rate and the driver's characteristics are established. This paper presents a method to determine the threshold of collision risk in expressway construction area based on driver's characteristics, according to the range of reduction rate and the relationship between deceleration rate and collision time function. In this paper, the risk degree of vehicle trailing in each section of expressway construction area is divided into four risk grades: safe, relatively safe, general conflict and serious conflict. Taking Xi'an Lintong Expressway reconstruction and extension construction area as an application example, The actual survey data are used to evaluate the degree of conflict risk in each section of expressway construction area. The results show that the following conflict risk is the highest in the warning area, its conflict risk threshold, conflict point and conflict ratio are obviously higher than those in the other sections, and for the same section, the greater the traffic volume, the higher the risk of the conflict. The results of this study can predict the possibility of collision with the rear end of each section of the expressway construction area, prevent traffic accidents from occurring, and also quantitatively judge the level of traffic safety.
【作者单位】：淮阴工学院江苏省交通运输与安全保障重点建设实验室;淮阴工学院交通工程学院;长安大学公路学院;
【基金】：国家自然科学基金项目(51608221,51408252) 江苏省科技厅政策引导类计划(产学研合作)——前瞻性联合研究项目(BY201606-01) 江苏省交通运输与安全保障重点建设实验室开放基金项目(TTS2016-07) 江苏省“333工程”科研项目(BRA2016454)
【分类号】：U492.8

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