基于道路特征信息变化率的公路线形质量评价

公路线形质量对行车的舒适性和安全性有着非常重要的影响，如何合理有效地对其进行评价是一个有待解决的问题。从驾驶员行车时接受道路信息的角度出发，提出了道路特征信息变化率的概念，并作为评价公路线形质量的定量指标运用到平面线形、纵断面线形和平纵组合的评价研究中。研究表明：平曲线半径越小，驾驶员接受的道路特性信息变化率越大，驾驶员负担也越重；此外，平曲线长度、竖曲线半径及平纵组合都对道路特性信息变化率有较大的影响。研究成果可为改善公路线形，提高行车安全提供依据。

Highway Alignment Evaluation Based on Road Characteristic Information Variation

Highway alignment has great effect on driving comfort and safety,and how to evaluate it needs to be solved.The concept of change rate of road characteristic information(CRRCI) is proposed based on drivers' reception to road information while driving.As a quantitative index for highway alignment evaluation,it is applied to research on evaluating the quality of horizontal alignment,vertical alignment and combination alignment.It is proved that the smaller radius of horizontal alignment,the larger CRRCI received by driver,and the heavier burthen pressed on driver.Further more,the length of horizontal alignment,the radius of vertical curve and mode of combination alignments have effect on CRRCI.The result can be used to improving highway alignment and increasing driving safety.