Accessibility and its many dimensions: why geographical accessibility should be named explicitly

Petteri Muukkonen 

In geography and transport research, accessibility is often defined and measured precisely, yet the term is frequently used as shorthand for geographical accessibility. This can reduce transparency in interdisciplinary contexts, where accessibility also refers to social, temporal, financial, informational, institutional, material, skills-related and experiential conditions of actual use. Geographical measures such as distance, travel time, travel cost, network connectivity and reachable opportunities remain indispensable, but they capture only one part of access. Drawing on a ten-dimensional accessibility model first developed in Finnish physical-activity planning, this review situates geographical accessibility within a broader vocabulary of access conditions. This review has two related aims. First, it argues that geographical accessibility should be named explicitly when spatial measures such as distance, travel time, travel cost or network connectivity are being analysed. Second, it situates geographical accessibility as one dimension within a broader multidimensional understanding of accessibility, which also includes social, temporal, financial, informational, institutional, material, skills-related and experiential conditions of use. Rather than proposing a universal theory of accessibility, the review uses the ten dimensions to relate geographical accessibility to conditions already discussed in transport, planning, disability, digital inclusion and public-service research. The contribution of this review is integrative and critical: the vocabulary is useful for research and planning only if its limits, overlaps and dependence on existing accessibility debates are made explicit.