An observation based on a (wet) week in York.
York doesn't seem to grok traffic queues.
(And, given that their idea of transport planning seems to be to throw a bunch of roads down at random and put a roundabout wherever the roads cross, queues are fairly common.)
What is odd is that it seems to be commonplace for drivers, upon joining a queue, to decide to try an alternative route and immediately turn round. Not just turn round - do a 3-point turn in the middle of a busy A road at that!
Several times, we were travelling in the opposite direction to the queue and had to break pretty hard to let some moron do a 3-point turn right in front of us.