peckham_ryu Wrote: ------------------------------------------------------- > I'm often overtaken in the > 20 zones, and almost always catch up to the > overtaker at the next set of lights, so I don't > think that 20 is really causing delay to journeys. This is definitely true. When i'm on my bike it's really noticeably how many times you pass the same vehicle as it overtakes, drops back, overtakes, etc. Speeding from one set of lights to the next doesn't actually get you to your destination noticeably quicker.