Abstract
This contribution describes the work of Focus Group three of the European Union network Sustainable Transport in Europe and Links and Liaisons to America (STELLA). It examines especially social and behavioural aspects of sustainable transport from a transatlantic perspective. Significant societal trends (e.g. the ageing of societies) are surveyed and their implications for mobility behaviour are drawn. The sustainability of this behaviour is considered along with constraints and drivers of this behaviour in Europe and North America. The contribution takes up relevant policy issues and concludes with a discussion of a transatlantic research agenda on social and behavioural aspects of sustainable transport. (Author/publisher)