摘要
为准确描述大连市道路交通阻抗,在美国BPR函数的基础上,引入影响车流通行时间的交叉口密度、道路限速、公交站点密度、饱和度等主要因素,建立了启发式道路阻抗函数.通过对大连市主干路的实证研究,利用非线性回归的方法标定了启发式路阻函数,并同美国BPR函数、重新标定BPR函数相互进行了比较.结果显示,启发式BPR函数更能准确地反映道路的车流行驶速度.
To describe the road impedance of Dalian accurately,in this paper,a heuristic road impedance function is molded on the basis of Bureau of Public Roads（BPR） function,with the affecting traveling time factors including intersection traffic density,road speed limits,bus site density,saturation and other factors.By the empirical study of Dalian main road network,non-linear regression is used to calibrate the parameters of the heuristic function.The comparisons with each other among United States BPR function,the new calibration BPR function and the heuristic road resistance function show that heuristic BPR function describe the true vehicle speed more accurately,which can provide information for traffic assignment.
出处
《武汉理工大学学报（交通科学与工程版）》
2013年第3期545-548,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(批准号:50978046)
关键词
道路阻抗
BPR函数
启发式函数
回归分析
road impedance
BPR function
heuristic road resistance function
regression analysis
