双车道公路平曲线段径向加速度相关实验研究

车辆的径向加速度是车辆在弯道上行驶时驾驶行为的重要表征,通过对加速度的分析,可对驾驶员加速和刹车的行为进行定量描述.通过对双车道公路平曲线处的车辆运行车速现场进行行车实验,获得车辆转弯时的径向加速度,利用Matlab软件建立了车辆加速度与平曲线线形之间的数学模型.实验结果表明,平曲线处车辆行驶时的加、减速行为：车辆从直线进入到曲线时逐渐以较大的减速度减速至该圆曲线半径所对应的运行车速;当汽车离开曲线时,会适当加速至期望车速,然后做匀速行驶.

Experimental research on radial acceleration with curve of two-lane highway

The radial acceleration of vehicle is an important aspect of driving behaviors,so driving behaviors can be studied by analyzing acceleration.By the experiment on the two-lane highway,the data of road alignment,radial acceleration,and operating speed can be obtained.And through the experiment,the correlation model of the radial acceleration and road alignment is established,and the model can be used to study the driver behaviors：Vehicle into the curve from the straight-line slow down to the operating speed can be lowered when the vehicle is driven into the curve of the straight line,but when the car left the curve,the vehicle will speed up to a constant appropriate speed.