Research On Vehicle Driving Safety On Mountain Road Based On Vehicle-road Coupling

Recently,with the vigorous development of the national economy and road transportation,Chinese highway mileage and car ownership in China have increased.At the same time,traffic safety problem have been increasingly highlighted.In order to prevent and reduce road traffic accidents,vehicle running safety on mountain road has become a research hot spot in the field of today's automobile industry.Both curve and steep slope combined alignment and steep slope followed by curve with small radius are traffic accident black spots.Vehicle rollover,crash and scratches as well as other dangerous accidents often happened on mountain road.Frequent traffic accidents have caused heavy casualties and property losses.In order to prevent and reduce road traffic accidents,vehicle running safety on mountain road based on vehicle-road coupling is studied and the evaluation model is established.It is helpful to improve the road traffic safety and reduce the accidents.This article combines National Natural Science Foundation project "Research on traffic safety identification theory of complex mountain road based on the driver-vehicle-road coordination",based on the present relevant research at home and abroad,vehicle running safety on mountain road is overall studied.The main research works include the following aspects:(1)Based on the analysis of influencing factors related to roadside environment safety on the mountain road,the safety indexes of roadside environment is established.Combing the matter-element extension method,section field mater-element matrix and traditional field matter-element matrix are established.The index weight is counted by entropy value,and then the comprehensive correlation of each evaluation index is also worked out.Then,the security of roadside environment is studded.(2)Through analysis of the impact of driver's behavior on expectation speed,expectation speeds under the condition of different vehicles and different highway grade are put forward.Combined with the road geometry,vehicle running speed models on typical sections are built based on regression analysis method.Considering the interference of outside conditions such as weather condition,traffic volume,driver visibility,and vehicle running speed prediction model on mountainous road is established and then the model is verified.(3)The method is put forward to calculate probability of traffic accident,frequency of vehicle exposed to dangerous environment and traffic accident severity through research and analysis of traffic accident features on mountain highway.With risk analysis theory,quantitative evaluation model of vehicle running safety on mountain road is established combining with coupling between vehicle and road.Through evaluation results of vehicle running safety on mountain road,a conclusion can be made that the model can calculate quantitatively risk index of vehicle driving safety and analyze the potential risk of mountain road.(4)Combining with vehicle running safety evaluation model,vehicle running status monitoring and safety evaluation system is established based on LabVIEW operation environment.The system includes a front panel(HCI)and a block diagram.The software program can achieve functions such as information input,vehicle running status display,dangerous condition monitoring,system operation,etc.