[QUOTE 3762520, member: 9609"]You certainly do get the clowns who sit in the middle lane at 50mph and they should be escorted off the road. However I do imagine that the majority of people getting their knickers in a knot over lane hoggers are sitting behind someone who is doing, or at least thinks they are doing the speed limit.
I would suspect the widely differing calibration of speedometers does cause problems - we are all aware of the Mercs, Beamers and Audis in the fast lane, part of the reason for this is they have very accurate speedometers, the bloke in the Citeron doing 80 things the BMW must be doing 90, truth is they both think they are doing 80.
I have a Berling Van whos speedometer is nearly 10% out, at 70 I am only doing 63½ - my wife has a Mercedes and at 70, it is doing 70. I would get pretty frustrated sitting in the fast lane behind someone only doing 63mph.
Someone pointed out earlier regarding lorries passing him in a 50 zone on a motorway, tachographs are pretty accurate, the truck may well be only doing 50 and he may well be only doing 45.[/QUOTE]
I doubt very much that those 'quality' cars do have more accurate speedos. More likely that those exceeding the speed limit are just doing that. My Focus had an error of about -2mph at 40MPH and I doubt it was much different at 70. A GPS can give you a fairly accurate reading and the signs warning you of your speed are quite accurate too.