长下坡路段车辆运行速度长程相关性分析  

Long-range Correlation Analysis of Vehicle Running Speed in Long Downhill Section

作　　者：张姝玮 郭忠印[1] 陈立辉 ZHANG Shuwei;GUO Zhongyin;CHEN Lihui(The Key Laboratory of Road and Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China;School of Civil and Architectural Engineering,East China Institute of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]同济大学同济大学道路与交通工程教育部重点实验室,上海201804 [2]东华理工大学,土木与建筑工程学院,江西南昌330013

出　　处：《综合运输》2020年第2期78-82,共5页China Transportation Review

基　　金：国家自然科学基金:高原低压稀氧环境下营运驾驶员驾驶疲劳演化进程与防控技术(71673201)。

摘　　要：公路长下坡路段车辆运行速度过快危及行车安全。本文利用VBOX Ⅲ设备采集了4种不同坡度长下坡路段车辆运行速度,运用DFA方法对其长程相关性进行分析。研究表明:运用DFA2方法可以较好地获得序列波动成分;4种坡度车辆运行速度序列均接近分维布朗运动,具有一定的长程相关性;不同的坡度对序列标度指数存在一定的影响,其中缓坡、缓坡-陡坡和陡坡-缓坡的长程相关性比较相似。本文研究成果可以为车辆运行速度预测提供依据,从而提高交通安全水平。The fast speed of vehicles on long downhill sections of highways can endanger the traffic safety. In this paper, the driving speeds of four different slopes with different slopes were collected, and the longrange correlations were analyzed by DFA method. The research shows that the DFA2 method can obtain the fluctuation components well;the four speed sequences are close to the fractal dimension Brownian motion, and have long-range correlation;different slopes have certain influence on the sequence scale index, among which, the long-range correlations of the gentle slope, the gentle-steep slope and the steep-gentle slope are similar. The results of this paper can provide a basis for vehicle speed prediction, thereby improving traffic safety.

关 键 词：长下坡 交通安全 行驶速度 长程相关性 DFA 

分 类 号：U492.8[交通运输工程—交通运输规划与管理]