论文部分内容阅读
选取自由流车辆作为分析样本,采用统计分析软件,对各观测点的试验数据进行处理分析,获得了自由流条件下的速度样本统计参数及累计频率曲线。分别利用K-S检验和S-W检验对所取得的样本进行正态分布检验。为获取运行速度特征值,在分析运行速度累计分布曲线变化规律的基础上,引入离差的概念,对运行速度取不同百分位值时的离散程度进行了分析,得出了运行速度特征值的定量化标准。结果表明:运行速度样本服从正态分布的假设;用于路线设计的运行速度应取速度累计分布曲线上的85%分位值;所得结论为公路运行速度的合理取值提供了理论支持。
Free-flow vehicles are selected as the analysis samples, and the statistical analysis software is used to analyze and test the experimental data of each observation point. The statistical parameters of the velocity samples and the cumulative frequency curve are obtained under free flow conditions. The K-S test and S-W test were used to test the normal distribution of the samples. In order to obtain the characteristic values of operating speed, based on the analysis of the changing rules of cumulative operating curve, the concept of dispersion is introduced and the discrete degree of operating speed with different percentiles is analyzed. The characteristics of operating speed The quantitative criteria. The results show that: the running speed samples are subject to the assumption of normal distribution; the running speed for route design should take 85% of the quantile on the cumulative speed distribution curve; and the conclusions provide theoretical support for the reasonable value of highway running speed.