Research On The Prediction Model Of Vehicle Safety Distance Based On Trust Level Of Driving

At present,due to the frequent traffic accidents caused by improper operation of drivers,the related research on the cognitive mechanism of drivers has been paid more and more attention.The study of drivers’ cognitive mechanism and behavior characteristics of vehicles,roads and environment can make up for the lack of drivers’ cognition,and then provide drivers with accurate and effective early warning strategies.In this paper,the driver’s cognition of vehicle and road was studied,a safe distance model and a two-lane highway overtaking model were established.The main contents are as follows:First of all,according to the driver’s perception of the vehicle and the road,the concept of " Trust Level of Driving " was put forward,and the vehicle test and simulator test were designed and carried out.In the vehicle test,four road line types of straight line,right-angle bend,S-bend and U-bend were designed in the closed site,and the testers were recruited to carry out the test according to the requirements,and the vehicle parameter data were collected and preprocessed.In the simulator test,UC-win/road driving simulator was used to build the test scene,and the driver braking operation response time data was collected and pre-processed.Then,a safe distance model based on trust level of driving in the vehicle was established.Based on the analysis of the typical safe distance model,considering the degree of driver’s trust to the vehicle and the road,and according to the driving conditions in front of the vehicle,a safe distance model which can reflect the difference between drivers was established.According to the vehicle test data and the driving simulator test data,the braking deceleration and reaction time of different drivers were analyzed,the trust level of driving during braking was classified,and the safe distance between vehicles was further classified according to the classification results.A carfollowing scene was built by the driving simulator to verify the effectiveness of the model.Finally,a two-lane highway overtaking model based on the trust level of driving was established.In this paper,the overtaking process of two-lane highway was analyzed,the influencing factors of overtaking behavior were summarized,the overtaking stage was divided,and an overtaking model considering trust level of driving was established.According to the vehicle test data and driving simulator test data,the established model was analyzed,the trust level of driving during overtaking process was classified.The overtaking model was further classified according to the classification results.An overtaking scene was built by the driving simulator to build to verify the effectiveness of the model.In this paper,the safe distance was divided into the safe distance of following and the safe distance of overtaking.The safe distance model and two-lane highway overtaking model based on the trust level of driving were established,which reflects the difference of drivers and makes up for the lack of driver’s cognition.It has important theoretical and practical significance to improve driving safety and improve traffic environment.