Single Vehicle Road Safety Analysis And Regression Model Based On Vehicle Dynamics

After years of development,road transport construction in China has gotten great achievement.That promotes the development of the national economy and social progress.However,compared with the rapid development of traffic construction,the current road safety level is behind the road construction.The current road safety level is behind the road construction speed.According to statistics,over the years,road traffic accidents and casualties are the highest in the world.That results in a huge economic losses,so the road safety problem has become the the great concern for society.With the road mileage and car ownership continuing to grow,road safety will face more serious challenges.So it is imperative to study road safety to advise for road design,construction and management to improve road safety level.The current road safety evaluation as a preventive way to reduce road traffic accidents,effectively improve the road safety level,and by the attention of countries around the world.Therefore,it is of great significance to carry out the study on road safety assessment to improve the road safety and promote the development of road traffic and national economy.This paper mainly carried out the following research:(1)According to Newton motion law and dynamics theory,the motion equations of four-wheel-eight-degree-of-freedom vehicle model are built.This paper uses "magic formula”tire model to build vehicle model in Matlab\Simulink.At the same time,this paper sets the same vehicle parameters in CarSim,and compares to the two simulation simulation of the vehicle dynamic response;(2)In this paper,CarSim software is used to simulate the driver-vehicle-road closed-loop simulation.Based on road safety data in the Washington state 2006-2015 decade in the Highway Safety Information System(HSIS),through the analysis of road accident data,this paper researches the sideslip and rollover accident about the Car and Sports utility vehicle(SUV)on the road curve.The vehicle dynamic response is obtained on each road curve segment by driver-vehicle-road closed-loop simulation in CarSim.With considering the interconnection between vehicle dynamic variables,the regression models of sideslip and rollover accident rate based on vehicle dynamic variables for the Car and Sports utility vehicle(SUV)were established by regression analysis;(3)According to the sideslip and rollover accident data of the Car and Sports utility vehicle(SUV),the regression models of the Car and Sports utility vehicle(SUV)based on road factors were established by regression analysis,with co sidering the impact of road factors and interconnection between road factors on road safety.On this basis,considering the impact of vehicle dynamic variables on road accident rate,a road accident regression models based on road factors and vehicle dynamic variables were established.At the same time,The impact of different road factors on vehicle dynamic response is analyzed by CarSim vehicle dynamics simulation.