The results of the analysis show that the highway longitudinal grade had little influence on pavement performance.

分析结果表明，公路纵坡对路面结构受力的影响不明显。

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The existing highway design criterion only takes setting pavement longitudinal grade, side ditch and drainage ditch into account in order to eliminate surface water.

现有的公路设计中，考虑较多的仅仅是通过设置道路的纵坡、边沟及排水沟等设施来排除地表水。

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