22 sets over 4 miles. A total of 3 are dedicated pedestrian crossings that are actually beneficial to pedestrians. 2 are completely anti-pedestrian - they do their utmost to stop pedestrains from crossing the road, despite the fact that pedestrians have no choice but to cross at these points. These 2 and all the others are to stop cars being driven into other cars (or would do if more drivers knew what red lights mean and how box junctions are supposed to work.)