Since the 1990s, the link between the lack of access to opportunities (work, health, shopping, leisure, etc.) and social exclusion processes has been the subject of growing interest in research and policy. In the United Kingdom, for example, the creation of the Social Exclusion Unit in 1997 was a starting point for the development of many studies analysing the spatial dimension of social exclusion. Lack of access to facilities and services has been cited among the components of social isolation. Similarly, in the US and in France the implementation of workfare policies has placed new emphasis on the necessity for job seekers to access employment. In the field of transport studies, access is generally analysed from a narrow point of view, as...