I suppose that we will find out whether or not these speed restrictions have done any good when statistics are released, in terms of air pollution, accident rates etc. Am i for it? I think so, driving across a busy city has its risks, minimising them isn't a bad thing in my opinion, if that's what the outcome is. We hear the scaremongering, the false concern from those who in reality, don't like being told what to do. It was the same when Bus lanes were first implemented then cycle lanes, people were going to get injured, killed, the road is too narrow etc. I can understand Eric's point on the more rural stretches of road where the risk of hitting someone is less, although isn't this more about air pollution than accident rates?