| Urban road guardrails are one of the most basic facilities in the road.They are of great significance of ensuring traffic safety,improving road safety performance,implementing traffic guidance,and increasing the aesthetics of urban roads.Urban road guardrails are not only simple isolated roads,but the more important purpose is to express and communicate urban traffic information about drivers and pedestrians,and achieve safe,fast,orderly,smooth and convenient effects.The research object of this paper is the central guardrail of urban roads,which plays an important role in separating the reverse traffic flow,improving the safety of drivers and pedestrians,and increasing the traffic efficiency of vehicles.This paper analyzes the correlation between road guardrail settings and traffic accidents,economic losses,road capacity and other factors.Through the evaluation results,the problems before and after the traffic barrier sett are summarized,and targeted countermeasures are proposed to improve the urban road traffic environment.Therefore,the purpose of this paper is to analyze the influencing factors of urban road guardrails properties set to obtain a correlation between urban road guardrails sett and influencing factors,and to improve the factors put forward the goal guardrails optimization recommendations.The research content of this paper mainly includes four parts: statistical analysis of relevant factors,evaluation index system construction,correlation analysis,and road guardrail optimization suggestions.Firstly,taking the present situation of the road and the construction of the road guardrail in Dongying city of Shandong province as an example,the influence of the urban road type of the construction of the road guardrail is analyzed.Then,four secondary roads to Dongying City,Shandong province were selected for relevant data collection.Through statistical analysis,the relationship between guardrail setting and direct economic loss,number of traffic accidents,cause of accident,form of accident,accident weather,location of accident collision,traffic capacity,Getting the relationship between urban road guardrail setting and traffic safety,cost and other related factors.Then,using the analytic hierarchy process,analyze the changes of relevant factors before and after the urban road guardrail is set,establish a more comprehensive and standardized evaluation index system.The established road guardrail sett index system includes 7 first-level indicators and 25 second-level indicators,and on this basis,determine the rating criteria of the evaluation indicators and the weight of each indicator.The logistic regression logic model was constructed by selecting the first few factors in the index system with the cumulative weight ratio reaches 90%,and the positive and negative correlation between the road guardrail setting and the influencing factors was analyzed.Finally,this paper according to the analysis results,from the road section traffic accident situation,capacity,surrounding environment,guardrail type,guardrail material,etc.,puts forward the optimization of urban road guardrail. |
