Yeah, but as a sociologist (I hate doing this!), I can tell you that changing culture by policy is pretty damn hard and can be counterproductive, and the results counterintuitive. It can end up being far more expensive and difficult than infrastructural changes. In any case, as in most of these kinds of arguments, I can't see that it is an either / or. Britain has terribly-designed roads: dell has already mentioned roundabouts, which are one of the curses of contemporary Britain; and, the British style of government is obsessed with posts, poles, signing, instructions, orders, and petty rules which turn our cities into cluttered unfriendly, Orwellian spaces. So we need infrastructural change, even if you aren't a segregationalist or any stripe. In the end, there are places where it is entirely appropriate to ban motorized vehicles (almost) completely, places where mixed traffic works and places where segregation works. I think this is part of what Blockend is trying to say, and I can't see anything wrong with that aspect of his argument at least. Sometimes we are too close to the subject, too passionate, and we don't step back in the way that we would on just about any other subject.
