公路行车视距检验的三维表面模型方法

3D Surface Model Method for Highway Sight Distance Test

提出公路行车视距检验的三维表面模型方法，即采用三角网式模型表示复杂多变的公路设计表面，通过检验司机视线与该模型是否相交而得到司机在任一桩位Ｐ处公路所能提供和保证的视距Ｌ，绘出视距沿线分布图Ｌ－Ｐ，及时发现影响行车视距的不利因素，以便改进设计。

A 3D surface model method for highway sight distance test is presented. The highway design surface is represented by triangular network model;the sight distance L which can be guaranteed by the highway at an arbitrary stake P can be obtained by judging the intersection between driver′s sight line and the model,then the diagram LP can be drawn to find out unfavourable influence on sihgt distance so as to improve highway design.