Study On Safety Influencing Factors And State Factors Of Continuous Downhill Sections

As the total length of highways in China continues to increase,the proportion of mountainous highways will become larger and larger.When high-speed roads are built in mountainous areas,continuous longitudinal slopes are often used to overcome terrain height differences.In order to solve the problem of frequent traffic accidents on continuous longitudinal slope sections,this paper takes the location identification and safety measures guarantee for the continuous downhill section of the continuous downhill section as the research object,and collects the relevant data on a highway in Beijing area to investigate the traffic safety accident mechanism of the continuous downhill section.After analyzing and researching,the information about the traffic safety accidents in the continuous downhill section,the types and forms of accident vehicles,and the influencing factors of the traffic safety accidents on the continuous slope of the continuous slope are analyzed.,laying the foundation for follow-up research.Secondly,through the on-the-spot collection of the running speed of the continuous downhill section of a highway in Beijing,the correlation between the slope,the length of the slope and the running speed is analyzed by the linear fitting function of the SPSS software technology platform,and the prediction model of the running speed of the large and small vehicles is determined respectively.Based on the multiple linear regression theory,the multivariate linear regression module of SPSS software is used to establish the prediction model of the running speed of large and small vehicles on continuous downhill sections,and then the physical model and regression model of the heating of large vehicle brakes are used.The brake pad temperature prediction was carried out on successive downhill sections.Then,by analyzing the traffic accident data of the continuous longitudinal slope downhill section of a expressway in Beijing area in the past three years,the SPSS is used to analyze the correlation between the accident rate and the brake braking temperature,the running speed average,and the design-run speed difference.The position evaluation index of the traffic accidents in the downhill section is different from other researchers.This paper conducts the risk grading evaluation of the downslope section through the study of the accident rate,and then puts forward the analysis steps and risk assessment methods for the location of the traffic accidents in the continuous downhill section.Finally,the safety guarantee measures for continuous downhill sections were proposed.This paper establishes models for large and small vehicle running speed prediction,large vehicle brake brake temperature prediction,and directly studies the temperature,running speed and its relationship with the accident rate,and establishes a risk rating evaluation method based on the accident rate.The location identification procedure for traffic accidents is provided and relevant security measures are provided.The research results of this paper can provide theoretical support and technical guidance for the safety evaluation,operation management and safety protection of continuous downhill sections..