摘要
由于地形、地质和气候条件等因素的制约,山区高速公路的设计标准较低,并且弯道半径、纵坡坡度、路面情况、道路线形综合协调等很难满足车辆快速、安全和舒适的运行要求.因此需要利用交通标志,尤其是线形诱导标志,为在山区高速公路上行驶的驾驶员指示前方线形的变化,提醒其提前采取相应措施,确保行车安全.运用公路测量学上的切线支距法对线形诱导标在山区高速公路的设置进行了探讨.对圆曲线路段的线形诱导标志的设置进行了推导,得出了线形诱导标志的位置.含缓和曲线路段的线形诱导标志的设置思路与圆曲线路段相同,只是应将缓和曲线单独用方程表达.
Design standard of highway in mountain area is low due to the limited factors such as terrain, geological and climate conditions. It is hard to meet the requirement of fast, safe and comfort driving because of the incompatible among the curve radius, vertical slope gradient, surface condition and shape of a mountain road. Traffic signs especially road shape instructions are adopt in highway of mountain area to insure safe driving as they can inform drivers about the front changes, that is useful for drivers to take corresponding measurement in advanced. The setting of road shape instruction along highway in mountain area was discussed using tangent offset method in road survey. Sign setting on round part was derived and the sign locations were obtained. Adjustment curve part is similar to the round part but using another curve equation.
出处
《天津城市建设学院学报》
CAS
2009年第2期85-89,共5页
Journal of Tianjin Institute of Urban Construction
关键词
山区高速公路
线形诱导标志
缓和曲线
切线支距法
highway in mountain area
road shape instruction sign
adjustment curve
tangent offset method
