Traffic control causes congestion

Monmouth. A40 southbound approaching the A466 (Wye Valley/Tintern Abbey route). Got caught there in diabolical congestion five years ago. Heading north to Ross-on-Wye last Friday, we saw the same half-mile 3-lane tailback and were reminded of it. Luckily we returned early Sunday morning. The roads were deserted, but as we approached, the lights changed to red against us. After checking there was no conflicting traffic, I turned left anyway. Unquestionably, those lights are largely responsible for the daily congestion that plagues that stretch. Up and down the land, the same assault on our time, pockets and the planet continues unabated. Will the traffic managers responsible ever appear in the dock?