2.
Once I was travelling at 128kph by the speedo in a 110 zone, when the cruise control was set to 120 (because I knew for a fact the speedo was 9% under in this vehicle), but I had come down a major hill and was going to let the next uphill take off the excess speed (this was a Motorway with virtually no traffic at the time, again in the Southern Highlands, just north of Mittagong). Then I saw the parked radar car up ahead and fully expected to be pulled over. However, he didn't budge. He clearly had his radar set to go off for cars doing +10 as determined by true speed, and I was doing only +8, even though the speedo said +18. In subsequent years I asked the NSW Traffic Commander about how they set radars (he was a client of mine) and he said it was "usually plus 10% of the limit plus 4kph" so in a 110 zone it would be +11 +4 = 15 (so I was still 7-9 kph under pinging speed, and in fact I could have been doing 135kph be the speedo and not been booked. Where's the sense in that???
25kph over by the speedo and not get booked!!!! EH???