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以高速公路抽样收费数据和小时降雨量为基础数据,对各个时段的小型车行程时间根据降雨类别分类,通过数理统计方法研究不同降雨类别对各个时段的行程时间影响。以均值分析为基础,分析各个时段不同降雨类别的行程时间均值差异性。通过绘制小型车行程时间累计频率分析不同降雨类别下的行程时间累计频率特性差异。利用Kruskal-Wallis非参数检验方法检验不同降雨类别下的各时段行程时间差距的显著性和总体行程时间分布差异性,并对不同类别下的行程时间进行最优分布拟合、正态分布拟合、以及Lognormal拟合。最后依据拟合参数得出行程时间增长系数。
Based on the highway toll collection data and the hourly rainfall data, the travel time of small vehicles in each time period is classified according to the rainfall category, and the influence of different rainfall categories on the travel time of each time segment is studied through the mathematical statistics method. Based on the mean analysis, the mean difference of the travel time of different rainfall types in different periods was analyzed. By plotting the accumulated frequency of travel time of small vehicles, the differences of accumulated frequency characteristics of travel time under different rainfall categories were analyzed. The Kruskal-Wallis non-parametric test was used to test the significance of travel time difference and the distribution of travel time under different rainfall types. The travel time under different categories was fitted with the best distribution and normal distribution , And Lognormal fit. Finally, according to the fitting parameters derived travel time growth coefficient.