【摘要】 推导了n次回旋线的平行线方程 ,分析了n次回旋线的平行线与n次回旋线的关系 ,提出了可以将n次回旋线的平行线看成是通用n次回旋线 ,证明了通用n次回旋线的圆曲线内移值和切线增量与n次回旋线的圆曲线内移值和切线增量相等。更多还原

【Abstract】 Equations of nth spiral curve parallels are deduced and connections between nth spiral curve and its parallels are discussed in this article. The opinion to regard nth spiral curve parallels as universal nth spiral curve is put forward. It is proved that the distance shifted to the inner and increased tangent distance of the highway midline’s and sideline’s circular arc are equal.更多还原