吴正,郭明旻,许谦.视频资料与交通流数据检测.-交通流实测视频与.PDF

 交通流视频资料与特征参数检测 吴 正1) 郭明旻1) 许 谦2) 1) 2) （复旦大学力学与工程科学系，上海200433 ） （嘉兴广播电视大学，浙江嘉兴314000) 摘要：本文提出一种基于交通流视频资料的特征参数检测方法，对国内五个城市拍摄了总共350 多小时具有不 同路况、时段、气候及其他特征的实际交通录像。将上海内环一个路段上环形线圈检测器所获得的流量数据与 视频资料进行对比，研究了环形线圈数据的可靠性和误差，发现存在 2% 以上的平均流量误差，部分时段可能 超过 5%。依据视频资料，对多条道路上的堵塞密度值进行了计算，并对其影响因素进行分析，发现堵塞密度 一般明显小于143veh/km，气候、坡度、车道宽度对其取值都能产生影响。 关键词：交通工程；视频资料；特征参数检测；环形线圈检测器；堵塞密度 中图分类号：O39, U491.112 文献标识码：A Video recordings and characteristic parameters screening of traffic flow Zheng Wu1) Ming-Min Guo1) Qian Xu2) 1) (Dept. of Mechanics and Engineering Science, Fudan University, Shanghai 200433) 2) (Jiaxing Radio TV University, Jiaxing, Zhejiang, 314000) Abstract A characteristic parameters screening method based on traffic flow video recordings is proposed in this paper. Over 350 hours actual traffic video recordings have been taken in five Chinese cities at the different roads, times, weathers and other situations. Comparing some data of traffic flow rate collected from loop detectors with the video recordings at a section of Shanghai Neihuan Road, we study the validity and error of loop data and come to the conclusion that there is an over 2% average error of flow rate in the loop data, and sometimes even over 5%. Furthermore the traffic jam’s density values of several roads are calculated based on the video recordings and their dependent factors are analyzed. It is found that the values are usually much fewer than 143veh/km and are influenced by weather, slope and wide of road lane. Keywords ：Traffic e