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System theory and intelligent system methods are increasingly introduced into the study of social economy system. This study applied the fuzzy theory to the arterial road project evaluation in Yangtze River Delta. It is an important stage in transportation planning. Highroad quality is a composite of various attributes, among them many separated attributes always lack of pertinence and comparability. This characteristic introduces the obstacles for respondent in project assessment. In order to overcome the issue, we invited trapezoidal fuzzy theory in obtaining criteria weights and AHP in ranking. Several programming schemes were evaluated on the basis of this method and it is testified to be simple, scientific and applicable.