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A parsimonious model for the safety assessment of horizontal curves using data from rural roads

机译：使用农村公路数据的水平曲线安全性评估的简约模型

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摘要

The safety of a horizontal curve (by means of accident frequency and degree of severity) is examined in this paper by features internal and external to it; both of these characteristics affect the driver attitude and the curve approach speed. Based on a review of the available literature on the subject, first the relationship between accident rate and some of the most important curve characteristics is examined. Then data from rural highways in Greece is used to investigate the relationship between accident rate and degree of curve or the curve radius. The flexible family of Gamma distributions is selected for this analysis and models using a special form of it (the shifted negative exponential distribution) are defined. The estimated functional forms are presented in conjunction with those from the literature and conclusions are drawn.
机译：本文通过内部和外部特征来检验水平曲线的安全性（通过事故频率和严重程度）。这两个特性都会影响驾驶员的姿态和弯道接近速度。在回顾有关该主题的可用文献的基础上，首先检查事故率与某些最重要的曲线特征之间的关系。然后使用希腊农村公路的数据研究事故率与弯道程度或弯道半径之间的关系。选择了灵活的Gamma分布族进行此分析，并定义了使用其特殊形式（移位的负指数分布）的模型。估计的功能形式与文献中的形式结合在一起给出结论。

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