[ghaff]

Well, the census has a binary definition and, for different purposes, it makes various degrees of sense although I can fairly easily go into one one of the largest US cities for a day or evening. I'm not in the boonies but I'm also clearly not in a location where car-less public transit can remotely work. And I'm not sure there is a reasonable mid-definition because at that point you're judging what degree of inconvenience is acceptable--which is pretty much the case with the regional transit system around where I live.