城市道路交叉口行车特征分析

采用动态测速仪测定多个交叉口的瞬时速度、减速度等参数,得到各测点车型分布特性、时段特性,并对瞬时车速进行拟合优度检验,提出当量速度的概念。交叉口的减速度大部分在0,2]区间内,急刹车的情况较少,当车辆减速度较大时,沥青路面承受较大的水平力,可能出现一次性剪切损坏。

Analysis on Driving Character at Intersection of Urban Road

The dynamic speed measuring instrument is used to measure the parameters of instantaneous speed,deceleration and etc.at many intersections so as to achieve the vehicle-type distribution characteristics and time period characteristic of each measured point,and to implement the goodness-of-fit test of instantaneous driving speed and to put forward the conception of equivalent speed.The deceleration of intersection is mostly within the area of and the sudden braking is a few.When the deceleration of vehicle is larger,the larger horizontal force is born by the asphalt pavement,which may cause the disposable shear damage.