This goes in line with my findings about how SATNAVs work and the way speedometers are calibrated, to a certain degree.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Terry Simpson Sent: 26 January 2005 22:06 To: U.S. Metric Association Subject: [USMA:32111] RE: red circle speed limit > Of Stephen Humphreys >A traffic police officer is unlikely to pull you over for doing 80mph >in a 70 zone - although he could still do that if he's in a bad mood. >Speedometers are calibrated in such a way that you are actually doing >less than what the figure says anyway. http://www.essex.police.uk/pages/pa/bt220200.htm "10% is the technically accepted margin of error for speedometers." http://ww2.northumbria.police.uk/ePolicing/Web/WMS.nsf/FAQContentDocs/FA Q004 821?OpenDocument "The standard ACPO (Association of Chief Police Officers) guidelines are 10%plus 2mph over the speed limit (i.e. 35mph in a 30mph zone) ... individual police officers can enforce below these guidelines if conditions justify this course of action."
