Quote:
Originally Posted by ophic
I've been done twice by speed cameras, for 36 in a 30 and 48 in a 40.
So I don't think your equation applies to all speed cameras.
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A general rule of thumb is 10% +1 mph, so 45 in a 40, I believe these are police guidelines. A complete tw*t of a copper could try and shaft you for less but it could be argued in court over speedo error, hence the guidelines exist.