  As mitigating car traffic in cities has become paramount to abate climate
change effects, fostering public transport in cities appears ever-more
appealing. A key ingredient in that purpose is easy access to mass rapid
transit (MRT) systems. So far, we have however few empirical estimates of the
coverage of MRT in urban areas, computed as the share of people living in MRT
catchment areas, say for instance within walking distance. In this work, we
clarify a universal definition of such a metrics, the "People Near Transit
(PNT)", and present measures of this quantity for 85 urban areas in OECD
countries, the largest dataset of such a quantity so far. By suggesting a
standardized protocol, we make our dataset sound and expandable to other
countries and cities in the world, which grounds our work into solid basis for
multiple reuses in transport, environmental or economic studies.

Physics and Society