Speedo accuracy - spin-off from QLD tolerances

[JC]

Originally Posted by JC

If you were in a pre 2006 car, and you got pulled over for doing 117 in a 110 zone, but you say you were doing 110, then the police may test your car. If you have the correct size tryres etc fitted, then they may let you off with an official warning, but don't expect to be let off a second time (depends on the copper, though).

Further to this, if you are booked in a new car (post 2006), then that's on you. With the prevalence of GPS these days, it's not that hard to know what speedo inaccuracy your car has - mine is at least 5km/h, so I just make allowance for that and sit slightly above the posted limit (as indicated) so I am doing around about the correct speed in actual terms.

What annoys me is people that have no idea their speedo is inaccurate, so they sit 5 or 10 under the indicated speed, which in reality means they are in a different speed zone altogether! Which means they may be doing as little as 60 in an 80 zone, which is perfectly legal, thopugh extremely annoying to every other user on the roads and can and does lead to accidents as described by MAD (assuming good conditions, otherwise good traffic flow etc).