高速公路单车道出口匝道车辆驶出特性及安全性影响研究  

Research on Safety and Vehicle Driving Characteristics on Single-laned Exit Ramp of Expressway

作　　者：刘智[1] 马强强 邵海鹏[2,3] 方瑞韬 林涛[2] LIU Zhi;MA Qiang-qiang;SHAO Hai-peng;FANG Rui-tao;LIN Tao(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China;School of Transportation Engineering,Chang'an University,Xi'an 710064,China;Key Laboratory of Transport Industry of Management,Control and Cycle Repair Technology for Traffic Network Facilities in Ecological Security Barrier Area,Chang'an University,Xi'an 710064,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]长安大学运输工程学院,西安市710064 [3]长安大学生态安全屏障区交通网设施管控及循环修复技术交通运输行业重点实验室,西安市710064

出　　处：《公路》2023年第7期333-342,共10页Highway

基　　金：国家重点研发计划,项目编号2021YFB2600403;中央高校基本科研业务费专项资金,项目编号300102219210,300102210201。

摘　　要：为探究高速公路单车道出口匝道分流车辆驶出匝道过程中的运行特性及安全性影响,基于西安市近郊高速公路直接式与平行式出口匝道无人机视频实测数据,利用Tracker软件提取分流车辆横向和纵向的位置、速度、加速度等指标,以Python作为分析平台使用聚类分析法对参数进行聚类,并通过巴特沃斯滤波器对聚类的点进行平滑处理。结果表明:直接式出口匝道车辆总平均速度70.52 km/h,小于平行式出口匝道的81.50 km/h,且在横向、纵向以及总的速度标准差和加速度标准差均小于平行式出口匝道,表明直接式出口匝道在行驶方面的安全性优于平行式出口匝道;直接式驶出点集中在(20~70 m);平行式驶出点集中在(50~120 m)。研究成果对高速公路出口匝道分流区精细化设计、车速管理和车路协同下直接式与平行式出口匝道的分流速度以及位置提供数据支撑和理论参考。In order to explore the safety of single-lane taper and parallel exit ramps on expressways and the driving characteristics in the process of exiting the ramps,based on the exit ramp Unmanned aerial vehicle(UAV) video,Tracker software is used to extract the longitudinal and vertical position,speed,acceleration and other indicators of dividing vehicles.Using Python as an analysis platform,cluster analysis method is used to cluster the extracted parameters,and Butterworth filter is used to smooth the clustered points.The results show that the total average speed of vehicles on the taper exit ramp is 70.52 km/h,which is lower than that on the parallel exit ramp which is 81.50 km/h.The longitudinal,vertical and total standard deviation of speed and acceleration are smaller than those of parallel exit ramps,which indicates that taper exit ramps are safer than parallel exit ramps.Taper exit points are mainly concentrated in 20~70 m;and parallel exit points are mainly concentrated in 50~120 m.This study provides a theoretical basis for the speed management of expressway exit ramps,the shunting speed and location of taper and parallel exit ramps under the condition of vehicle-road coordination.

关 键 词：交通安全 高速公路 出口匝道 安全性 聚类分析法 巴特沃斯滤波器 无人机视频 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]