Haven't read it yet.. would bookmark but hey, why not share it with you guys first! From what I can tell apparently some police cars have exaggerated speedos like any other car, and were giving speeding tickets off pacing. Not good!

www.nswombudsman.nsw.gov.au/publications/ Publist_pdfs/reports/SRTP_speedometers_and_speeding_fines_0403.pdf