高原山区双车道公路超车车道设置条件与参数  

Overtaking Lane Setting Conditions and Parameters on Two-Lane Highway in Plateau Mountainous Area

作　　者：邹峰 张驰[2] 李超同 吴成余 颜家强 ZOU Feng;ZHANG Chi;LI Chao-tong;WU Cheng-yu;YAN Jia-qiang(Sichuan Communication Surveying and Design Institute Co.,Ltd.,Chengdu,Sichuan 610031,China;School of Highway,Chang’an University,Xi’an,Shaanxi 710064,China;Qingyin Branch of Hebei Expressway Group Co.,Ltd.,Shijiazhuang,Hebei 050010,China)

机构地区：[1]四川省交通勘察设计研究院有限公司,四川成都610031 [2]长安大学公路学院,陕西西安710064 [3]河北高速公路集团有限公司青银分公司,河北石家庄050010

出　　处：《公路交通科技》2024年第8期114-128,共15页Journal of Highway and Transportation Research and Development

基　　金：四川省科技计划资助项目(2022YFG0048);四川省交通勘察设计研究院有限公司科研项目(232022007);陕西省自然科学基础研究计划项目(2023-JC-YB-391)。

摘　　要：为给高原山区双车道公路超车车道的设计提供参考依据,针对高原山区双车道公路超车车道设置的几何条件、交通量条件与设置长度开展研究。通过工程实例验证了模型的有效性,进行了超车车道长度与运行速度的相关性研究。首先,结合高原山区条件的影响,从保证超车车辆驾驶人舒适度的角度出发,给出了高原山区双车道公路超车车道的最小圆曲线半径值;其次,从车辆转向安全行驶的角度出发,给出了超车车道的最大上坡和下坡坡度条件;然后,建立了双车道公路交通冲突时间与交通量、设计速度的关系模型,并给出了各设计速度下设置超车车道的交通量条件;最后,基于VISSIM仿真试验数据,利用多元非线性回归法构建了高原山区双车道公路超车车道长度模型。结果表明:在高原山区环境下,当双车道公路的设计速度分别为80,60,40 km/h时,满足设置超车车道要求路段的交通量应大于392,364,318 pcu/h;平面圆曲线半径应大于610,370,200 m;下坡方向的最大纵坡分别为―2.4%,―2.7%,―3.2%;上坡方向的最大纵坡分别为2.6%,3.0%,3.5%;在同一交通量条件下,随着双车道公路超车车道长度的增加,小客车的平均运行速度呈现出逐渐增大的趋势,当超车车道长度达到一定值时,平均运行速度维持在80 km/h,不再发生明显变化。To provide the reference for overtaking lane design on two-lane highway in plateau mountainous area,this article conducts research on the geometric conditions,traffic volume conditions,and length of overtaking lanes on two-lane highways in plateau mountainous areas.The model effectiveness was verified through engineering examples,and the correlation between overtaking lane length and operating speed was studied.First,considering the influence of plateau mountainous conditions,from the perspective of ensuring overtaking vehicle drivers’comfort,the minimum circular curve radius value for overtaking lane on two-lane highway in mountainous areas was given.Second,from the perspective of safe vehicle steering,the maximum uphill and downhill slope conditions for overtaking lane were given.Then,the relation model among traffic conflict time,traffic volume,and design speed of two-lane highway was established.The traffic volume conditions for setting overtaking lane at various design speeds were given.Finally,based on VISSIM simulation experimental data,the model of overtaking lane length on two-lane highway in plateau mountainous area was constructed by using multiple nonlinear regression method.The result indicates that in the plateau mountainous areas,when the design speeds on two-lane highways are 40,60,80 km/h respectively,the road section traffic volume meeting the requirements for setting overtaking lanes should be greater than 318,364,392 pcu/h.The planar circular curve radii should be greater than 610,370,200 m.The maximum longitudinal slopes in the downhill direction are-2.4%,-2.7%,-3.2%respectively.The maximum longitudinal slopes in the uphill direction are 2.6%,3.0%,3.5%respectively.With the same traffic volume,as the length of overtaking lane on two-lane highway increases,the average operating speed of small bus shows the gradually increasing trend.When the length of overtaking lane reaches a certain value,the average operating speed remains at 80 km/h,and no more significant changes will occur.

关 键 词：道路工程 双车道公路 曲面拟合 超车车道 超车车道设置条件 

分 类 号：U268.6[机械工程—车辆工程]