So the relationship between longitudinal gradient, grade length limit, vertical curve and safety is analyzed, which can be referred to improve the safety and optimize the profile design.

根据下坡路段事故统计资料，分析纵坡坡度、坡长、竖曲线和下坡衔接平曲线与道路安全的关系，为提高长大下坡路段安全，优化纵面设计提供参考。

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This paper studied the design of scupper spacing of deck in vertical curve with the basic principle of hydraulic and hydrologic compute.

利用水力水文计算基本原理，研究了竖曲线内桥面泄水孔间距。

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