An internet survey has been conducted among drivers in the Netherlands and Japan to study their attitude towards Green ITS. The survey focuses on driving behavior and ITS experience, attitude towards environment, and Green ITS preferences. The results show that money-related information gives the most effective motivation for drivers to follow fuel efficient behavior; the least preferred information is impact on environment. Correlations are found between information preference and the driving style. The majority of the respondents intend to make frequent use of Green ITS. Based on these results, a new design for Green ITS is proposed, providing drivers with information on driving behavior, expenses on fuel consumption and environmental factors.