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首页> 外文期刊>American Journal of Traffic and Transportation Engineering >Safety Effects of Geometric Design Consistency on Two-lane Rural Highways: The Case of Ethiopia
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Safety Effects of Geometric Design Consistency on Two-lane Rural Highways: The Case of Ethiopia

机译：几何设计一致性对乡村高速公路的几何设计一致性的安全效果：埃塞俄比亚的案例

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Different studies conducted, regarding the development of statistical models used to predict crash occurrences along two-lane rural highways, around the globe and particularly in Ethiopia, rely on geometric characteristics than explicitly considering measures of design consistencies. Recently, the issue of geometric design consistency in highway design is emerging as an important criterion. This study is therefore carried out to evaluate the design consistency on horizontal alignments using measures of design consistency and develop safety functions that exclusively include design consistency measures. Elements of all road sections considered in the study were rated as good, fair or poor design using design evaluation criteria. Poisson regression and Negative Binomial regression modeling approaches were used to assess the relationship between measures of design consistency and road safety. Using information criteria goodness-of-fit, Poisson regression model was found better fit to the data than NB regression models. Three different crash prediction models which explicitly incorporate design consistency measures were successfully developed. The models can be used to predict crashes of two-lane rural highway having similar characteristics with the road considered under this study. Finally, based on the results of this research, further detailed study on effect of highway design consistency on road safety and current design guides related to design speed selection to account for design consistency revision was recommended.
机译：关于统计模型的开发进行了不同的研究，用于预测沿着两道农村高速公路，尤其是在埃塞俄比亚，依赖于几何特征，而不是明确考虑设计符合措施。最近，在公路设计中的几何设计一致性问题是出现的重要标准。因此，进行该研究以评估使用设计一致性测量和开发专门包括设计一致性措施的安全功能的水平对齐的设计一致性。在该研究中考虑的所有道路部分的元素被评为使用设计评估标准的良好，公平或差的设计。泊松回归和消极二项式回归建模方法用于评估设计一致性与道路安全措施之间的关系。使用信息标准的优良性，发现泊松回归模型比NB回归模型更好地符合数据。成功开发了三种不同的碰撞预测模型，该模特明确地融合了设计一致性措施。该模型可用于预测双线农村公路的崩盘，该公路具有与本研究中考虑的道路相似的特征。最后，根据本研究的结果，建议进一步详细研究了公路设计一致性对道路安全和与设计速度选择相关的电流设计指南的进一步研究，以考虑设计一致性修订。

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