cant be bothered doing loads of quotes but UB... the allowances depend on the county councils. in some places you can easily be done for speeding doing 32 in a 30 zone. this is because manufacturers do build a tolerance into speedos, but its generally 10% UNDER the reading, so if you get caught speeding its never their fault, you were definitely doing much over the limit as the dial reads.
i see the argument that average speed cameras can cause issues where you cant move over because youre all going the same speed, but in those circumstances, you know your junction is coming up soon, move over earlier... the average speed thing usually only lasts about 2-3 miles max so youre looking at a junctions length and there are signs well ahead of time. you should be thinking "my junction is next, and theres an average speed thing just before it, i better move over now as no matter what lane im in it wil take the same time so may as well be in the left lane ready"
and yes figures for deaths on the road havent gone down really, accidents related to speed HAVE, its just more and more idiots are drink driving etc, and there are more and more people driving on the roads every year, so the figures may not have gone down in number, but as a percentage you would probably see a decent drop with cameras.
yes theyre a pain sometimes, i got 3 pouints for doing 65 on the motorway 3 years ago in a 50 zone with a van on a bridge. stupid you may think, but the restriction was due to roadworks, which had GONE the week before, no more workers, no more lane closure, just the cones on the hard shoulder and the speed trap remained and i was following the flow of traffic so alot of people got done that day lol!!
if its such a worry to you persoinally il sell you my road angel compact with laser detector if i can find it. no subscription left on it, i only used it once and didnt see the need, i generally dont speed.
and a side note, stop slagging the police off, if you cant do the time dont do the crime
youre the one breaking the law so its your fault, and they wouldnt focus on raking in speeding fines, and concentrate on catching "real criminals" if you didnt make it so easy for them. if somneone offers you a 5er for no effort at all, or asks you to chase a yob with a gun, which would you choose?