15-minute cities, 'walkability' and last millimeter problems

The 15-minute city concept is about planning and building cities so that most essential activities can be accessed within 15-minutes of a residence on foot or by bicycle. The possibilities and limitations of the concept for disabled persons have yet to be fully considered. Here I centre disability in a hopeful critique of concepts central to 15-minute city implementation. I argue that greater attention should be given to what I call last millimeter problems, barriers within small spaces (e.g. subway platform gaps) disabled persons face in transportation systems and the built environment that can make any city, including a 15-minute city, an impassable city.