Actually, the RTA wants to lower the threshold to only 4KM/H (Thus means the threshold is currently higher) people I know in the police force, currently put the threshold at around 8KM/H.
Considering at 100KM/H most cars have around a 6KM/H over read, to be busted, your speedo is over 14KM/H over the limit (IE, 124KM/H in a 110 zone!).
There's a bunch of streets around me at the moment, where I've driven a few cars down that currently have mobile speed readouts. 50KM/H zone, all of these cars read either 45 or 46KM/H
80 Zone, all reading around 74/75km/h
Not just one make/model, but a few!
Secondly, how long do you guys stare at your speedos for? I check all mirrors and my speed in under a second. That's why they call it GLANCING. You can look and get a very quick idea of what your speed is without staring at it and doing your 6 times tables.
And the only people I know of being road raged for sitting on the limit, are the dopes who aren't over taking anyone and ar ein the right hand lane, and there are others who want to break the speed limit and don't mind getting caught.
Those who get rear ended are normally in the above circumstance and attempt to stop suddenly