Evaluation Methods Of Highway Mountain Road Risk

Mountain road twists and turns meandering,its turning radius is small,the slope is large,difficult in the downhill brake,corners and longitudinal sections of the road more complex,the line of the complex line of sight when the turn is not good,and The design of the road alignment is discontinuous.Especially in mountainous areas,such as bridges,tunnels and junctions,and other special sections of more.In the special section of the tunnel entrance light contrast,lead to mutation bridge approach speed.When the road around the canyon,cliffs and river more,if the car out of the driveway,and crashed into the car rollover occurs,the risk coefficient is big.There are many researches about road safety at home and abroad,but it is mainly focused on the safety index of the road,and there is little research on the evaluation of the driver's risk level.In our country,the research on traffic risk evaluation starts late,and the risk theory is introduced into the road traffic in the end of last century.The traditional risk assessment methods in mountain area are mainly qualitative analysis and evaluation of the traffic risk grade of mountain highway.So it is very important to strengthen the research on the risk of road traffic in mountain area.Through the Influence degree analysis on driver performance of the analysis of road condition,road environment and traffic flow,We can evaluate the risk grade of road traffic,improve the driving conditions of the road and reduce the traffic risk,so as to ensure the safety and comfort of the driver in driving the vehicle.In accordance with the possibility of mountain road accidents,combined with the severity of traffic accidents,the mountain road traffic risk is divided into grades,and determined on the criteria for each grade.Corresponding to the different risk levels of mountainous highway,according to the three aspects of highway environment,road conditions and vehicle type risk source,this paper takes corresponding risk prevention and control technology through linear optimization,linear improvement,information dissemination and environment optimization and other aspects.Because of the current domestic research on the risk of highway traffic started late,the early literature is relatively small.They are vague to the concept of driving risk,and lack of awareness of the role of traffic risk assessment to ensure the driver's safetyand road design.The establishment of evaluation model and the determination method of related parameters,the evaluation criteria of road traffic risk grade in mountain area and the accurate rationality are great difficulties.