Research On The Construction And Application Of Driver's Psychological Field Model In Traffic Conflict Environment

With the continuous acceleration of the urbanization process,urban traffic accidents occur frequently,and the problem of road traffic safety can not be ignored.As an effective evaluation method of traffic safety,traffic conflict can effectively reduce the occurrence of traffic accidents and improve the safety level of urban road traffic system,which has very important engineering and practical significance.At present,the traffic conflict technology for traffic safety evaluation,most are based on the principle of automobile dynamics and kinematics,only considering the influence of the limited factors(mainly conflict vehicles),ignoring the subjective feelings of the driver,The description of the coupling mechanism between the driver("man"),the road user("car")and the road environment("road")is not clear enough,and the results of road traffic safety evaluation can not be agreed,so the traffic conflict is greatly restricted in the practical application.Therefore,this paper takes the traffic conflict between urban road users as the research object.First,the basic theory of traffic conflict is expounded and analyzed,including the definition,classification and severity order discrimination method of the traffic conflict,and then the basic characteristics of the field of physics are combined with the basic idears of the physics field,to define the driver's psychological field in the environment of traffic conflict.The effects of various factors on the psychological field are described qualitatively from the angle of man-car-road,including the driver's characteristics,the object of the conflict and the influence of the road environment.At the same time,the mathematical expressions of the influencing factors are expressed separately,and the basic formulas of the electric field model are used for reference to establish the driver's psychological field model under the traffic conflict environment.Then by building simulation experiment platform of traffic conflict,using the simulated traffic conflict data and the physiological data of the driver calculated the driver's field strength,and the validity of the model is verified by the time distance discrimination method of traffic conflict severity.According to the existing criterion of division of the traffic conflict serious order,we divide the driver's psychological field strength in different conflict scenes and get the strong range value of psychological field with different severity.Finally,the theoretical application of driver's mental field model is discussed.Compared with the existing traffic conflict technology on road traffic safety evaluation method,by constructing the driver's psychological field model,it considers the influence of many factors such as man – car-road and other factors during the traffic conflict,and makes the discrimination of traffic conflict severity order more comprehensive,At the same time,it also provides new research ideas and methods for the evaluation of traffic conflict in road safety.