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《公路路线设计规范》规定,曲线内侧行驶轨迹的半径,其值为加宽前路面内缘的半径加上1.5米。在圆曲线内,它实际上是路中心线的一条等距线。因此认为,在直线上和缓和曲线段,行驶轨迹也是路中心线的一条等距线。这条等距线与路中心线的线距为D=B╱2-1.5(米) (B是路面宽)一、视距曲线方程如图1,视距曲线是消除横净距的边界。
The Road Route Design Code stipulates that the radius of the inner track of the curve, which is the radius plus the inner radius of the front road surface plus 1.5 m. In the circular curve, it is actually an equidistant line of the center of the road. Therefore, in the straight line and ease the curve segment, the driving track is also an isometric line of the centerline of the road. The distance between the equidistant line and the centerline of the road is D = B ╱2-1.5 (m) (B is the width of the road). The equation of line-of-sight curve is shown in Figure 1, and the line of sight curve is the boundary to eliminate the horizontal distance.