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为研究连续下坡道路的纵坡坡度、坡长与事故率的关系,采集了6条连续下坡路段的事故数据和纵面线形参数,选取事故地点坡度、事故地点向上坡方向长度为N(N=1,2,3,4,5 km)的平均坡度为纵面参数,绘制散点图观察不同纵面参数对事故率分布的影响,并对事故率与各纵面参数进行指数回归和相关性分析。结果表明:事故率与平均坡度呈指数上升关系,与不同纵面参数之间的相关性差异是显著的;连续下坡道路某点的事故率取决于该点向上坡方向2~3 km路段的平均坡度。
In order to study the relationship between longitudinal slope length and slope length and accident rate of continuous downhill road, accident data and longitudinal line shape parameters of six consecutive downhill sections were collected. The slope of accident location was selected. The length of the accident location uphill was N (N = 1, 2, 3, 4, 5 km) as the longitudinal parameters, the scatter plot was drawn to observe the effect of different longitudinal parameters on the accident rate distribution, and exponential regression and correlation between the accident rate and each longitudinal parameter Sexual analysis. The results show that the accident rate increases exponentially with the average slope, and the correlation with the different longitudinal parameters is significant. The accident rate of a certain point on a continuous downhill road depends on the point of up to 2 ~ 3 km Average slope.