Travel demand management (TDM) addresses the problems of energy consumption and pollution associated with increased motor vehicle use through strategies focused on improving asset utilisation, physical restraint, pricing, and urban and social changes. This paper concerns the last of these areas and examines programs aimed at changing attitudes and subsequently travel behaviour through individual measurement and personalised information. While Australian research results reviewed here are encouraging, results from the Netherlands highlight psychological processes which can reduce the effectiveness of these programs. This research area has important implications for the development of information campaigns designed to influence travel behaviour