By the study of automobile s headlight scatter angle,standard cross-section of tunnel and driving rule in tunnel,the different characteristics of vehicle s turning right and left,this paper work out helix line development s minimum radius of horizontal curve in freeway tunnel under different design speeds.
通过对汽车前灯散射角、隧道标准断面以及驾驶人在隧道中驾驶规律的研究,并考虑汽车左转与右转行驶的不同特点,计算出了不同设计速度下满足山区高速公路隧道内螺旋展线停车视距的圆曲线最小半径。