1.宜选用较大的竖曲线半径。竖曲线设计，首先确定合适的半径。在不过分增

1.宜选用较大的竖曲线半径。竖曲线设计，首先确定合适的半径。在不过分增加工程数量的情况下，宜选用较大的竖曲线半径，一般都应采用大于竖曲线一般最小半径的数值，特别是前后两相邻纵坡的代数差小时，竖曲线更应采用大半径，以利于视觉和路容美观。只有当地形限制或其他特殊困难不得已时才允许采用极限最小半径。
2.同向曲线间应避免“断背曲线”。同向竖曲线，特别是同向凹形竖曲线间如直线坡段不长，应合并为单曲线后复曲线。
3.反向曲线间，一般由直坡段连续，亦可以相互直接连接。反向竖曲线间设置一段直坡段，直坡段长度一般不小于计算行车速度行驶3s时间的行程长度。如受条件限制也可相互直接连接，后插入短直线。
4.应满足排水要求。

結果 (英文) 1:

1. use large radius of vertical curve. Design of vertical curve, first determine the appropriate RADIUS. Without excessively increasing the number of engineering situations, suitable for large vertical curve radius, in General, be greater than the minimum radius of vertical curve of values, especially algebraic difference of the two adjacent longitudinal slope before and after hours, large radius of vertical curve should be used in order to facilitate road appearance and visual appearance. Only when the terrain or other special difficulties resort allows ultimate minimum radius.2. the curve in the same direction to avoid "broken curve". Vertical curve in the same direction, especially the concave vertical curve in the same direction as the line slope is not long, and should be merged into a single curve after curve.3. reverse curve, generally by the continuous linear slopes, can also be connected directly to each other. Reverse vertical curve set a straight slope, linear slopes in length not less than the design speed 3s stroke lengths of time. Such conditions can also be connected directly to each other, inserted after the short line.4. drainage requirements should be met.

結果 (英文) 2:

1. should use a larger radius of vertical curve. Vertical curve design, first determine the appropriate radius. Under unduly increase the number of engineering cases, you should use a larger radius of vertical curve, generally should use a value greater than the minimum radius of vertical curve in general, especially before and after the two-hour difference between the adjacent vertical grade algebra, vertical curve should adopt large radius, in order to facilitate the visual appearance and the way the content. Only the terrain restrictions or other special difficulties of last resort to allow the use of minimum radius limit.
2. Avoid co-curve between "Brokeback curve." Vertical curve in the same direction, especially with such a straight line segment is not long slope between the concave vertical curve, should be merged into a single complex curve after curve.
3. Inter reverse curve, generally consists of a straight stretch of consecutive slope, it can also be directly connected to each other. Vertical curve set between the reverse slope of a straight segment, straight slope length is generally not less than the calculated driving speed with the stroke length of time 3s. Subject to conditions as may be directly connected to each other, insert short line.
4. should meet the drainage requirements.