The purpose of this paper is to derive the suggestion towards to the design guideline of Personal Mobility (PM) for giving a good visual impact for the pedestrian. For this purpose, first of all, pre-experiment has been done to briefly evaluate the impression to the whole body size of PM by using Semantic Differential method and factor analysis. From the results, it turned out that big PM is associated with heavy or high rigidity feeling, and then they had a negative impression. Next, conjoint analysis was done to find the answer to “Which component gives the strongest influences to the pedestrian's impression?” The results showed that pedestrian's impression to the PM is dominated by PM's height. The derived suggestions are as follows: “The height of PM should be low as much as possible” and “The body width should be wide (about 600mm), although the importance of it is low compared to the body height.”.
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