Optimization Decision Method Of Highway Route Design Scheme And Its Application

The construction of highway infrastructure is one of the important links in the construction of comprehensive transportation system in China,which will further affect the realization of the goal of making China’s transportation stronger.Therefore,it is necessary to further improve the efficiency of highway construction and improve the ability to optimize the highway route design scheme.Considering that the traditional evaluation model of highway route design scheme is not comprehensive enough in the evaluation index and complicated in the decision-making method,it is necessary to conduct further research on the evaluation of highway route design scheme.First of all,in this paper,the highway route design introduces the basic theory analysis,and sums up out of the highway route design scheme in the construction of evaluation index system should follow the basic principles,can be used to construct the building method and etc.,and then build up a set of contains six primary index(technical evaluation,economic evaluation,safety evaluation index,environmental impact assessment index,social impact assessment index,beautiful sex evaluation index)and 26 secondary index(route length,maximum longitudinal slope,slope section number,etc.)of the road route design scheme evaluation index system.Then,aiming at the coexistence of qualitative index and quantitative index in the evaluation index system of highway route design scheme,different index assignment methods and index data operation rules are given respectively.After analyzing the common multi-attribute decision making methods,the evaluation model of highway route design scheme is established by using the grey relational analysis method.Finally,with the case of the high-speed Berlin dongsheng connecting line highway project in simian mountain as an actual case,the weights of each index in the evaluation index system of the route design scheme are determined by means of questionnaire survey.In each route design scheme based on the actual situation to after the assignment of each evaluation index,calculate the grey relative similarity of each alternative A,B,C,D four alternatives to the calculation results are as follows: 0.5616,0.5420,0.4816,0.4278,and get the optimal this conclusion,A scheme to verify the validity and practicability of the model.