Ghost of a flea

The new roundabout (see picture) was the work of the Road Research Laboratory (RRL) and their solution was brilliantly simple. All they did was combine two roundabouts in one - the first the conventional, clockwise variety and the second, which revolved inside the first, sending traffic anti-clockwise.

PC Steve Dudley, one of the police officers involved with the introduction of the new system, recalled: "There was someone from the RRL up on a crane and officers on each of the five junctions. We would let the traffic build up and then let one lot go at a time. After a few trial runs we let the whole lot go at once. It was quite nerve-racking, but it did work."