Method On External Transportation Corridor Planning In Mountainous City

Mountain is the natural barrier to the survival of residents,a mountainous city with a wide variety of mountain.Mountainous city external development through "along the river system,cross the river system,along the mountain,pass through the mountain" four stages,must break through the mountain to completely get in touch with the outer space.Mountainous city transportation regional corridor planning and construction is a necessary condition for the external transportation development,mountainous city due to its unique terrain conditions and topographical features,regional transportation corridor often become a mountainous city transportation network congestion,the conspicuous influence of mountainous city road network comprehensive level of running,restricting the further development of the mountainous city.Mountainous city regional transportation corridor planning is to realize the external priority transportation development,scientific planning of regional transportation corridor of mountainous city transportation development has the extremely vital significance.At present,the relevant experts and scholars on the planning method of the urban regional transportation corridor through in-depth study,each has his strong point,and its own characteristics,also they have achieved some results.However,most of the existing planning method has universal applicability,little mountainous city related method,therefore,the mountainous city transportation corridor planning method also has the important theoretical significance.In this paper,from the basis of the transportation corridor concept and planning theory,expounds the basic concepts of transportation corridor,characteristics,types and structure of hierarchical analysis and other related theories;And forecast of the demand of existing regional transportation corridor planning,path planning,analyzes the theory of optimal allocation;Research is mainly focused on the evolution of mountainous city’s external development process,and analyzes the various forms of regional transportation corridor mountainous city;And in mainland China’s largest mountainous city of Chongqing as an example,study the external conditions for the development of mountainous city implementations,and emphatically analyzes the running characteristics of transportation;Analyzed the regular transportation corridor demand forecasting method and its limitation,presents a neural network nonlinear time series method is used to establish model of mountainous city regional transportation corridor total annual travel demand,this method has high accuracy;Using MNL model based on utility theory,the planning of corridor and the mode of transportation of the share rate of prediction;Applying the node important degree of joint mountainous city transportation location line method for regional transportation corridor path planning,and at all levels both transportation planning optimizing scheme of preliminary planning;On the basis of the theory of multiple objective and the maximum utility theory,put forward two kinds of mountainous city regional transportation corridor optimalallocation model,and using particle swarm optimization algorithm for solving;finally in Chongqing urban area as an example,the use of a neutral network nonlinear time series prediction method to predict total annual transportation in Chongqing;Using the node important degree of joint transportation location line on Chongqing’s regional transportation corridor to path planning;The selection of Chengdu—Chongqing corridor using the optimal allocation model as an example.