In the summer you expect jams on the A303 because of man-made bottlenecks, i.e. dual-carriageways funneling into single. But nearing the end of a mega jam the other day, I saw it was due to something else: traffic lights at a roundabout. The principal A303 was getting just 12 seconds of green time, while the A345 (with much lighter traffic) was getting 35 secs! They pap you and zap you for straying over the limit when the road is clear, but when you’re bumper to bumper for forty minutes because of misapplied control, do they say sorry?