How far will we walk to go somewhere depends on the quality of the walking experience. An obvious conclusion maybe, but one that bears repeating. In central Paris or Rome, folks will regularly walk 5 miles a day, and enjoy it, because the cities are lively and interesting the whole way. I have an elderly friend in San Francisco who regularly walks all the way from the Presidio, where she lives, to downtown (and sometimes back again) for errands, but also for the people watching and joy of it. Density alone is not enough to make a place walkable, and lower density — if it’s interesting enough — can still entice people to wear their comfortable shoes. Good details in the original post.