>I guess it is near a critical point where a relatively small change in traffic results in a large change in travel times, traffic jams, etc.? Yes, same as sch

>I guess it is near a critical point where a relatively small change in traffic results in a large change in travel times, traffic jams, etc.? Yes, same as school traffic (certainly where I live in the UK). It's not all the traffic on the road, but the difference it makes is enormous.