公路线形设计时是先进行平面线形设计，然后进行纵面线形设计。公路线形设计

公路线形设计时是先进行平面线形设计，然后进行纵面线形设计。公路线形设计提供给驾驶者的是一条立体的线形。所以，线形设计中平纵面线形配合的问题就显得很重要了。
1.理想的平纵组合是平竖曲线的位置相互对应，且平曲线稍长于竖曲线。或者竖曲线位于直线段上且不超过直线段。
2.平曲线与竖曲线半径的大小均衡是保证立体线形协调、平顺、连续的基本要求。
3.平纵组合应考虑驾驶员的视觉感受。

結果 (英文) 1:

Highway geometric design is the first horizontal alignment and vertical alignment design. Highway geometric design provided to motorists is a solid line. Therefore, the horizontal and vertical linear design problem of the linear fit is very important.1. is the ideal combination of horizontal and vertical position of the vertical curve correspond to each other, slightly longer than the vertical and horizontal curve curves. Or the vertical curve is a straight line segment and no more than a straight line segment.2. vertical curve radius of horizontal curves and balanced is guaranteed three-dimensional linear coordination, the basic requirements of a smooth, continuous.3. horizontal and vertical combinations should take into account the driver's vision.

結果 (英文) 2:

Highway Alignment Design is the first time a planar alignment design, then The vertical alignment design. Highway Alignment Design is provided to the driver of a three-dimensional linear. Therefore, linear design Zhongping The vertical alignment with the issue becomes very important.
1. The ideal combination of horizontal and longitudinal vertical curve is flat position correspond to each other, and the flat curve slightly longer than the vertical curve. Vertical curve or line segment located no more than a straight line segment.
2. The flat curve and vertical curve radius size three-dimensional linear equalization is to ensure coordination, smooth, continuous basic requirements.
3. flat vertical composition should consider the driver's visual experience.

結果 (英文) 3:

Highway alignment design is the first plane alignment design, and then carries on the vertical plane alignment design. Highway alignment design is provided to the driver is a three-dimensional line. So, the alignment design of vertical alignment with the medium is very important.1 the ideal horizontal and vertical combination is the position of the horizontal vertical curve, and the flat curve is slightly longer than the vertical curve. Or the vertical curve is located in the straight line segment and does not exceed the straight line segment.The 2 level curve and vertical curve radius of the size of the balance is to ensure that the three-dimensional shape of the coordination, smooth, continuous basic requirements.3 horizontal and vertical combination should consider the driver's visual perception.