山区高等级公路路侧安全物元可拓评价研究

Research on the matter-element extension evaluation of roadside safety of high-level road in mountainous areas

山区高等级公路路侧环境是一个复杂的系统,其安全状态具有随机、模糊和不确定的特点。全面考察影响道路路侧安全性的各种因素,从道路线形、路侧危险物、路侧防护技术和路侧景观4个方面选取15个评价指标,构建评价指标体系并对其进行了量化计算。由此,综合专家打分法和信息熵赋权法,并与物元可拓理论相结合,建立了适应于山区高等级公路路侧安全的物元可拓评价模型,同时给出了与其相应的规范化算法及流程。最后通过对湖南西部某运营期山区公路的路侧安全评价表明,该方法客观有效。

In order to reduce the roadside accident rate and heighten the highway traffic safety, this article is entitled to introduce an inno- vated evaluation model for improving the highway roadside safety. As is known, highway roadside environment, particularly those in the mountainous areas, is indeed very complicated and troublesome, characterized by unexpected happenings. To achieve the goal of suc- cessful assessment, we have chosen the Matter-Element Extension theory to deal with the problem of the relationship between quality and quantity when we take the actual conditions of highway roadside envi- ronment into full account. The first and foremost factor is to establish and prepare an optimal evaluation index system. At this, we have se- lected 15 evaluation factors in terms of road alignment condition, roadside hazards, roadside protection facilities and roadside landscape condition when all kinds of influential factors of roadside safety of higher-level roads in mountainous areas are taken into consideration in our paper. For another thing, it is necessary to make up in mind that all the ,transportation should be allowed to carry reasonable weight, which should be the key factor to a scientific assessment model. Therefore, our assessment model has to take into account a comprehensive entropy weight theory, which is an objective method and the potential statistical data to be included, though an expertise scoring method, a subjective method by nature, is also of great sig- nificance for its high-level professional knowledge and practical expe- rience. In addition, we have attached the matter-element extension e- valuation model to the comprehensive weight for its being suitable for the roadside safety of high-level roads in the mountainous areas. And, finally, the evaluation model we have developed is also feasible for the operational management and control of the high-level roads in western Hunan province, which can be seen from the result of our e- valuation results done in the area. Thus, the assessment method here presented proves to be reasonable and effective. It can provide engi- neers with a useful reference to their identification of high rate acci- dent sections.