On those occasions that I head out into the burbs I'm struck by just how much space is used. It reminds me of when I was living in Pwovidence, Vo Dilun, during a time when they were trying (somewhat successfully) to revitalize the downtown area. A presenter noted that you could fit the entire downtown inside the footprint of one of the local malls. Anyway, it's helpful for understanding why people see mass transit as some sort of alien and at best unpleasant thing, given the distances involved. For me, 3 miles is a a rather generous estimate of the radius of my every day life. For many, 3 miles is the minimum distance to anything.