Abstract
This study aimed to analyze effective driving way and change to eco-driving using the eco-driving pilot program data. The data of nineteen participants who drive regularly the same route were selected for the analysis with the view to exclusion of the fuel economy influencing factor except for eco-driving. Sixteen of nineteen (84%) had improvement effects from 5.6 % to 36.8%. The contributions of idle and the other driving status were different in individuals. The results of analysis indicated that the driving changes of idling stop before and after moving, and gas pedal off early were main factors of fuel reduction.