Research On Evaluation Method For Expressway Network Planning Target Of Metropolitan Area In China

Metropolitan area is the center of regional economy, the focus of its construction is to build"polarization-diffusion"economic network, driving the development of regional economy harmoniously. In the integrated transportation system of metropolitan area, expressway network can satisfy the developmental demand better with its technical advantage, form the uniform market, therefore the expressway network become the roll booster to make regional economy incorporation in metropolitan area.As metropolitan area economy is developing speedily and space configuration is expanding, when carrying through the new expressway network planning of metropolitan area, we must consider the incorporation of regional economy and transportation, making the planning target correspond with the economic system and integrated transportation system. As a result, after establishing the expressway network planning target of metropolitan area, we must evaluate the target scientific and systemic, find deficiency, optimize the target, provide scientific strategic target to lead the planning work.Hitherto, expressway has developed in china only near 20 years, the evaluation theory and method which mainly used on expressway network planning target of metropolitan area is in debate. Presently, expressway network planning target of metropolitan area are still short of systematic and scientific evaluation mechanism and method, which affected the process of expressway network planning.The paper mainly relates to the present problems existing in the expressway network planning target of metropolitan area in china, provides the content system for expressway network planning target evaluation of metropolitan area with theory and method of system engineering, and conceives the index system combined with the particular features. The paper bases on the special features of expressway network planning target evaluation of metropolitan area, using the gray relation analysis method into multi-layer synthetically evaluation , establishes an evaluation model for expressway network planning target evaluation, and put forward correlative advice to advance the sustainable development abilities of expressway network planning target.