Space, Time and Sequencing: Substitution at the Physical/ Virtual Interface

This chapter is concerned with methodologies for determining accessibility at an individual and aggregate level, both from the perspective of what the individual can access and of the degree to which many individuals can access a location. Throughout this chapter, however, the authors view accessibility as a time-space phenomenon, both in terms of how accessibility should be conceived and of how it should be reported. In essence, we attempt to take the space-time view of Hägerstrand (1970; 1975) and build from it a framework for defining accessibility in an enhanced way, making that definition operational for large numbers of people and extracting new forms of expression and query from it along the way.