Re: Wrong question
"Probably not, but the original AC post claimed that good drivers don't need to look at the speedo to know their speed. I don't disagree except that a 2% error should not, in my view, merit points and a fine. Especially when, as you note, the speedo doesn't need to be better than -0/+10% accurate anyway."
No, it said good drivers don't need to *constantly* look at the speedo. 2-3 glances a minute should be enough to catch any casual/unnoticeable drift in speed. But as stated, their speedo probably said 55. Judging by the error and the reference to km/h, this wasn't in the UK (likely it was Australia) and was probably just a fine, not points on a licence.