Research Urban Road Intersection Traffic Safety Assessment Based On Level Of Service Of Safety

In recent years, with the news fast development of social economy, the urbanization level isincreasing day by day in our country, the urban traffic is faced with great challenges and tests, thetraffic safety problem is particularly prominent. Intersection nodes of all kinds of trafficintersection, the traffic safety situation is relatively poor, prone to traffic accidents, thus not onlyaffected the safety of the transportation system, but also to a certain extent, affect thedevelopment of the whole city.How to carry on the scientific and reasonable evaluation on thesafety of the intersection is one of the main research content in the field of transportation,improve the intersection safety must solve the problem. This article as a starting point, safetyevaluation index system, how to build the intersection safety evaluation model is set up, and toquantify the model calculation results are studied and discussed, the main work and researchresults are as follows.(1)In order to easy and quick evaluation of intersection traffic safety conditions at the sametime, guarantee the accuracy of the evaluation, this article through to the common evaluationmethods (based on the safety evaluation of traffic accidents and safety assessment based ontraffic conflict evaluation idea of induction and summary, analysis of the shortcomings, from thenature or cause of the intersection is not safe Angle, put forward using the safety gradeintersection service level for urban road safety evaluation.(2)Specific to the mixing characteristics of urban traffic characteristic, the urban roadintersection, on the basis of functional classification, from near the urban road grade intersectionand traffic system consisting of a person, vehicle, road and environment in the four majorelements of the integrated urban road grade intersection which affect safety of many influencefactors, and through the qualitative and quantitative analysis of the influence factors, evaluationindexes, four hierarchy intersection safety evaluation index system is constructed.(3)Analyzing common traffic safety evaluation method, based on fuzzy hierarchy based ongrey correlation theory, and to include the contents of safety evaluation index system as thestarting point and the intersection safety evaluation model was established, the model in order tocause unsafe intersections, the nature of the conflict situation (the number, type and severity) asthe core, considering the dynamic factors such as changes in traffic flow and traffic intersectionsafety static factors such as physical characteristics of the impact of combination and into. (4)According to the3sigma quality management control theory, and the current urban roadservice level of the hierarchy is consistent, based on the calculation result of safety evaluationmodel of risk value as the center line, the safety service level of urban road intersection is dividedinto four grades, formulated the standard grade, and has carried on the qualitative description tothe corresponding safety service level. On this basis, in view of the security service levels for theintersection of level3and below, the detailed safety improvement measures are put forward, inorder to improve the safety of the intersection.(5)In consideration of the intersection safety service level is a complete set of traffic safetyevaluation system, many indexes are involved.In order to improve the evaluation efficiency,through the analysis of the intersection safety evaluation model and steps, using Microsoft VisualStudio2012as a development platform, and compiled the intersection safety evaluation systemsoftware program,.Through the actual engineering example proves the rationality of theevaluation model and evaluation system software program is practical, the result has reached theexpected goal.Urban road intersection traffic safety assessment based on level of service of safety use thesecurity service level as a standard of safety evaluation, the evaluation results intuitive,convenient data acquisition, can not only for the safety of the intersection design, safetyrenovation to provide certain reference standards, but also provides the user with anunderstanding of intersection with the basic conditions to achieve a kind of what kind of qualityof service standards, increased the intersection traffic safety to intersection of a service that has agood application prospect.