it will lull people into thinking they are safer than they actually are. Traffic calming measures would be more effective as it forces vehicles to slow. I believe main roads should stay at 30mph. All in favour of the 20 limit, makes really no difference as most roads they plan to introduce it to are already lined with parked cars on both sides an most people don't do over 20-25 on them anyway. The people that do travel quickly down these sorts of roads, are the people who wouldn't obey the speed limit anyway such as the cyclists that zoom down Ashley down hill, pass you on the left as your indicating and trying to turn left. But if Bristol does have the funds to spend on road safety, how about a campaign to educate the hundreds of cyclists that run red lights, pass on the left when there is no cycle lane and generally just have no training with traffic or understanding of traffic. What ever happened to the cycling proficiency test? All good intention of making the roads safer, but the one set of road users that cant be stopped from speeding (think the limits don't apply to them, and usually don't have a speedometer) have no liability on the road anyway, so unless you pass a by-law or something you are just wasting money on flashing signs and road signs. Once again, some and I repeat some, cyclists run red lights and cycle on pavements. But still