7.45am this morning queues both lanes, but noticed that while my westward travelling lane got two goes on the green light, the opposite lane didn't move when our lane was redlighted. with a tailback to Red Post Hill. SO presume not working. Coming back the other way, 45 minutes later, the same. Then a workman came out with a Stop/Go sign and nonchantly swizzled it around while smoking a fag.It would be quicker to have no lights and people use their common sense in giving way in a road narrowed for the length and width equivalent of one double parked car.