山地城市交叉口车辆纵行运行特性  

Vehicle Operation Characteristics of Intersections in Mountain Cities

作　　者：王延鹏[1] 刘小明 彭金栓[1] 张河山[1] 徐进[1,3] WANG Yan-peng;LIU Xiao-ming;PENG Jin-shuan;ZHANG He-shan;XU Jin(College of Traffic and Transportation,Chongqing Jiaotong University,Chongqing 400074,China;The Second Design Institute,Xiamen Municipal Engineering Design Institute Co.,Ltd.,Xiamen 361015,China;Chongqing Key Laboratory of“Human-Vehicle-Road”Cooperation&Safety for Mountain Complex Environment,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学交通运输学院,重庆400074 [2]厦门市市政工程设计院有限公司设计二院,厦门361015 [3]重庆交通大学山区复杂道路环境“人-车-路”协同与安全重庆市重点实验室,重庆400074

出　　处：《科学技术与工程》2022年第26期11682-11690,共9页Science Technology and Engineering

基　　金：国家重点研发计划(2018YFB1600500);重庆市自然科学基金(cstc2018jcyjAX0288);重庆交通大学研究生科研创新项目(2021B0007)。

摘　　要：为研究车辆在山地城市道路交叉口停车减速阶段的运行特性,利用无人机采集了某山地城市道路交叉口的高空视频数据。基于云平台DataFromSky AI,采用Lucas-Kanade和背景差分等算法提取视频中车辆的速度和加速度等数据。按照不同坡度类型,分析停车减速过程中速度变化特征、停车点位置分布规律等运行特性。结果表明:在不同坡度路段,越靠近停止线的车辆其截面初速度越大,离散程度越高;停止线位置处的速度均与停车距离具有较强的正相关性;上坡路段车辆截面初速度、减速率和速度降幅均小于下坡路段;车辆与停止线距离越近,其停车位置点分布越集中;下坡路段车辆停车点位置更分散,分布的区间也较大,停车距离也逐渐增大。本次研究结果可以为山地城市道路交叉口仿真模型参数标定与修正等方面提供理论支撑和数据支持。In order to study the operation characteristics of vehicle deceleration at the crossroads,a drone was used to collect the video of road intersections in a mountainous city.Firstly,the Lucas-Kanade and background difference algorithms were developed to extract the vehicle data in the videos through the cloud platform DataFromsky AI.Secondly,the vehicle speed variation characteristics and the distribution law of parking points were analyzed according to different slope types during parking deceleration.The results show that in different slope sections,the closer the vehicle is to the stop line,the greater the initial velocity of the area and the higher the dispersion degree.The velocity at the stop line has a strong positive correlation with the stop distance.The vehicle section s initial speed,deceleration rate,and velocity decrease in the uphill section are smaller than those in the downhill section.The closer the distance between the vehicle and the stop line,the more concentrated the distribution of the stopping position.The location of vehicle parking spots in the downhill section is more scattered,the distribution interval is more significant,and the parking distance gradually increases.The results can provide theoretical support and data support for the calibration and correction of simulation model parameters of road intersections in mountain cities.

关 键 词：交通工程 航拍视频 山地城市 交叉口 运行特性 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]