【摘要】 利用广佛高速公路的数据，首先比较了以15min、5min和1min为统计间隔统计的各流率区间内的速度、密度均值，以及最高频率出现的速度、密度值，然后比较了以15min、5min和1min为统计间隔的统计结果标定的Greenshields模型和Underwood模型，认为：标定交通流模型时，可采用的最小统计间隔为5min;当模型精度要求为10％时，最小统计间隔为1min．更多还原

【Abstract】 Based on the data of Guangfo Expressway, the different average speeds and densities taken separately from different flow sections, choosing 15min, 5min and 1min as statistical intervals, are compared one another and so are the maximum frequency speeds and densities from the same flow sections. Then Greenshields model and Under wood model are calibrated on the basis of statishcal results, also choosing 15min, 5min and 1min as the statistical intervals. Finally the determined conclusion is made: 5min is the minimum statistical interval for calibrating traffic models, while for the traffic models precision prescribed less than 10%, 1min statistical interval is workable.更多还原