山地城市道路交叉口车辆纵向加速度特性分析  

Analysis of Vehicle Longitudinal Acceleration at Road Intersections in Mountainous Cities

作　　者：陈正委 刘小明 唐勇 张海平 徐进[1] CHEN Zheng-wei;LIU Xiao-ming;TANG Yong;ZHANG Hai-ping;XU Jin(College of Traffic&Transportation,Chongqing Jiaotong University,Chongqing 400074,China;Sichuan Nanyu Expressway Co.,Ltd.,Nanchong 637000,China)

机构地区：[1]重庆交通大学交通运输学院,重庆400074 [2]四川南渝高速公路有限公司,南充637000

出　　处：《科学技术与工程》2023年第11期4865-4873,共9页Science Technology and Engineering

基　　金：重庆市高校创新研究群体项目(CXQT21022);重庆市技术创新与应用发展项目(cstc2021ycjh-bgzxm 0338)。

摘　　要：为明确车辆在山地城市交叉口停车等待到直行通过这一过程中的纵向加速度特性以及驾乘人员舒适性,在重庆市选取4处交叉口作为研究对象。基于无人机航拍的交叉口交通流视频,提取车辆运行状态参数,研究不同坡度交叉口不同停车位次的车辆纵向加速度特性,并以加速度和急动度为指标进行舒适性分析。结果表明:在缓坡路段,停车位次越靠前的车辆其加速度峰值越大;在下坡路段,车辆在加速阶段末段加速度会在0上下波动,车辆间断性的加减速;在上坡路段,第1和第4位次车辆加速度特性相近,加速峰值较大,第2和第3位次加速度特性相近,加速峰值略小;第1停车位次的车辆在下坡减速过程中更容易带来不适感。In order to clarify the longitudinal acceleration characteristics and the comfort of drivers and passengers in the process of parking and waiting to pass through at mountain city intersections,four intersections were selected as the research object in Chongqing.Based on the intersection traffic flow video captured by unmanned aerial vehicle,the vehicle running state parameters were extracted,the vehicle longitudinal acceleration characteristics of different parking positions at the intersection were studied,and the acceleration and jerk were used as indicators for comfort analysis.The results show these as follows.In the gentle slope section,the higher the parking position,the greater the peak acceleration of the vehicle;in the downhill section,the acceleration at the end of the acceleration phase of the vehicle will fluctuate up and down at 0 m/s 2,and the vehicle will accelerate and decelerate intermittently.In the uphill section,the acceleration characteristics of the 1st and 4th positions are similar,and the acceleration peak is larger,while the acceleration characteristics of the 2nd and 3rd positions are similar,and the acceleration peak is slightly smaller;the first parking position and vehicles are more likely to bring discomfort during downhill deceleration.

关 键 词：山地城市道路 交叉口 停车位次 纵向加速度 急动度 舒适性 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]