My son was given a ticket for 115 km in a 100 zone. His vehicle speedo showed 100 to 101 and his GPS reading showed the same. He had two passengers in the vehicle at the time and they all looked at the readings. He did not know why he was pulled over at the time. The cop blamed the tyres which were brand new straight out of the shop within hours of this T.I.N, then he said the speedo must be incorrect and to top it off he stated that a GPS is not accurate. Sorry, but if a GPS can direct you to a reef some hundreds of miles of shore and to the same mark each time, I would say that they are extremely accurate. How would one take action to dispute this T.I.N. under Traffic Law? He is on his red "Ps", 3 points and $235 fine. I believe this now doubles as it is school holidays, would this be correct? All three have said there was no speeding involved.