This study seeks to determine to what extent increased awareness of the implications of modal choice directly influences intention, translates into action, and increases the use of active methods of transportation to sustain or enhance personal and ecological health. The problem is that the general public awareness about the impacts of sedentary lifestyles on health and the environment is marginal and the systems that combine visualized information into meaningful knowledge about said issue do not respond to individuals’ life circumstances. Previous work has failed to address the problem as no connections between psychological inquiries of awareness, the intention-behaviour gap, motivation, decision-making, and the impact of customizable information presentation have been drawn. In this thesis we introduce a future system that combines mobile media technology with sensed data to generate customizable information in a way that responds to the user and encourages a behaviour change toward a more active lifestyle. A research-through-design approach was applied that combined the development of five different knowledge visualization mock-ups with a presentation of those options in an online survey examining people’s perception regarding a general interest in customizable information, a preferred information presentation style, and an estimation about the likelihood of how such information would affect use of the system and subsequently modal choice. We expect this approach to help in specific design practice while improving the quality of knowledge visualizations for systems that produce customizable information, and personal and ecological health in general.