Abstract
The spread process of clean energy vehicle opposing to conventional vehicles is discussed in the study to realize low carbon society. The decision making action about the vehicle choice at the vehicle purchase is modeled. The choice of the clean energy vehicle is based on potential consciousness, and uses the questionnaire survey. The vehicle choice model is decision making structure with much variety, ant the application of the statistical model is difficult. Therefore, the decision tree technique to clarify decision making structure is used. The fuzzy decision tree technique to describe a judgement based on the fuzzy information about the clean energy vehicle is used. The decision making structure of the driver for the vehicle choice is clarified, and the examination of the spread policy of the clean energy vehicle is enabled.
