Study On The Construction Sequence Of Expressway Passage In Changsha City

The urban channel entrances and exits are the important channel of the urban material system and the external connection,and its operating efficiency will affect the whole road network operation condition.In the planning and construction of expressway entrances and exits,due to the different angles of planning and government managers' views on urban construction,there is often a conflict between the status quo of the established channel and the ideal state of the planned channel.There are inevitably differences in the planning process in the implementation process.On the other hand,for the completed channel entrances and exits in the operation process will encounter a lot of traffic problems,need to further improve and solve.Therefore,it is necessary to carry out improvement research on this kind of import and export.As the status of the import and export traffic,the time required for the transformation,the ease of transformation,the situation of funds in place are not the same,so the transformation of the import and export channels do not have to be carried out at the same time,according to the actual situation of the entrance to the channel entrance Modification order.Therefore,it is very necessary to do the construction of the channel entrance to the timing study.Firstly,the thesis analyzes the characteristics of the channel entrances and exits from the aspects of transportation,environment and function,and elaborates the basic requirements of the principle,condition and setting of the entrance and exit of the expressway channel,and analyzes the characteristics of the channel entrances and exits.Research on the configuration of channel entrances and exits by using the advantage index method.Secondly,from the point of view of traffic location,the driving factors and constraints of traffic location are analyzed,and a qualitative analysis is made on the timing of channel entry and exit.The weighted cost distance analysis model is used to calculate the accessibility of the channel entrance The research on the timing of channel entry and exit provides a theoretical basis.Thirdly,combining with the theoretical knowledge of the second and third chapters,the traditional multi-attribute decision-making method is analyzed and improved,and the decision-making index system of channel entrance and exit is established.The combination of AHP and entropy method The gray relational degree and the ideal solution are combined to construct the time series model based on "gray relational degree-ideal solution".Finally,based on the analysis of the status quo of expressway entrances and exits in Changsha urban area,the time series model of highway entrance and exit improvement roject in Changsha city is analyzed by using the gray correlation degree-ideal solution method.