Study On Road Safety Evaluation Based On Vehicle-road Dynamic Interaction

With the vigorous development of road traffic in our country,road traffic accidents have also increased year by year.The horizontal and vertical design in the existing road design has not been able to meet the requirements of road safety.Road safety has become a problem that road designers must pay attention to.Based on the analysis of existing road safety evaluation and theoretical research,this paper uses ADAMS software as a platform,the vehicle driving safety is analyzed by vehicle dynamic index,and the suggestions for road alignment design are given.First of all,vehicle-road-driver model are established in ADAMS/Car.The vehicle is a typical car model.The Hintsoft of road design software is used to output the actual road coordinates date,and the 3D Spline and the 3D Equivalent-Volume road are established for different simulation conditions.Secondly,the conditions of vehicles driving along a S-curve road and avoiding on curved road of no intermediate isolation zone are simulated.The relationship between the dynamic response mutation and vehicle safety is analyzed,and it is concluded that changing the road design parameters can improve the dynamic performance and provide suggestions for the driving condition.Thirdly,considering the abrupt change of the adhesion coefficient of the road surface,three different water skiing conditions are simulated,and the simulation condition of tunnel entrance deceleration and tunnel exit accelerate,and put forward the correct driving strategy for the driver.Then,the threshold value of each dynamic index is obtained from he simulation situation of this paper and literature.Based on the response surface analysis method,the relationship between the road alignment and the vehicle dynamics index is established,and the parameter selection of the road alignment design index is quantified.Finally,the engineering examples are analyzed,and the design of this section is optimized.