Study On Vehicle Early Warning Of Abnormal Driving State On Expressway

China’s highway traffic safety situation is serious that occur serious traffic accidents from time to time and reveal traffic safety problems.The application of vehicle active safety system can effectively avoid traffic accidents,reduce the number of casualties and alleviate the degree of harm.Therefore,according to the state before vehicle traffic accidents,using expressway traffic accident data,to analyze the cause of traffic accidents and caused casualties occur.Through the establishment of early warning model,the selection of early warning indicators and early warning parameters threshold,so as to develop suitable for low-end models modified vehicles running abnormal warning software,and set up a simulation platform to verify its warning effect.Firstly,the driving state of vehicles before the occurrence of expressway traffic accidents is analyzed,the abnormal driving state model of vehicles is established,and the degree of correlation between the abnormal driving state of vehicles and expressway traffic accidents are judged through the adoption of improved gray correlation analysis.Secondly,the risk sources of abnormal driving is identified,the structure of the main risk sources of abnormal driving is constructed,the risk probability index method is adopted to classify the risk level of abnormal driving,analyze the risk degree of abnormal driving,and select the key risk causes of abnormal driving.Thirdly,the risk evaluation index of abnormal driving is selected to construct the risk factor evaluation system of abnormal driving.Through the adoption of the fuzzy hierarchical comprehensive evaluation method,the risk value evaluation model of abnormal driving is established to obtain the most significant risk factor of abnormal driving.Finally,the warning methods of vehicles abnormal running is selected,the warning standards of vehicles abnormal running is prescribed,the warning indicators of vehicles abnormal running is analyzed,the warning level of vehicles abnormal running is divided,and the warning degree of vehicles abnormal running is determined.Precaution system of vehicles abnormal running is established,the warning software of vehicles abnormal running is designed,and the warning effect of vehicles abnormal running is verified on the Carsim/MATLAB/Simulink simulation platform.Vehicles abnormal warning system is mainly for the domestic car ownership low-end models,through the way of grading warning,let drivers to predict the risk of driving,timely change behavior,optimize the auxiliary driving decision-making,improve vehicle safety,strengthen traffic safety,effectively restrict major traffic accidents.