形平微区系数一级公路小客87.81-0.2440.8083.288-0.616大客79.08-0.1540.8078.710-0.559小货73.67-0.1600.8071.925-0.469中货68.31-0.0600.8070.956-0.455大货65.00-0.1500.8062.375-0.327二级公路小客70.50-1.240.7580.00-60.00大客53.90-0.770.7580.00-60.00小货60.50-0.970.7580.00-60.00中货56.70-0.860.7580.00-60.00大货58.40-0.910.7580.00-60.00三级公路小客58.3-1.490.6762.18-45.18大客46.9-1.010.6762.18-45.18小货50.0-1.150.6762.18-45.18中货47.6-1.040.6762.18-45.18大货45.5-0.940.6762.18-45.18注:资料来源于《StudyofPrioritisationofHighwayInvestmentsandImprovingFeasibilityStudyMethodologies》(WorldBank,1995)纵坡对车速影响的坡度调整系数,公式如下:高速公路、一级公路:式中:──坡度调整系数;──相关系数,见表8-6;──纵坡。表8-6高速公路、一级公路坡度调整相关系数的取值车型小客大客小货中货大货-4.42-4.87-4.71-5.08-5.39注:资料来源于《StudyofPrioritisationofHighwayInvestmentsandImprovingFeasibilityStudyMethodologies》(WorldBank,1995)二级汽专及其它一般公路:式中:──坡度调整系数;──相关系数,见表8-7;
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