The economic competitiveness of a city, as well as the life quality of its residents, is directly affected by access or connectivity to urban amenities and ser¬vices, both internally and externally. Infrastructural, technological and social developments have trans¬formative impacts on this connectivity. New forms of organisation and management, new services and new business models are being tested in response to market pressures, environmental regulations, or in expectations and practices of urban dwellers. This paradigm shift requires an improved understanding of the needs and behaviour of urban commuters, the sectorial changes at stake, their interrelationships and their overall effect on urban performance.