This is a very interesting subject at a very unique time. Just last weekend I was traveling a streach of highway that was straight, flat and no overhead obstructions. My cruse control was set at 69 mph, when a County Shereff Deputy stopped me. My first reaction to myself and to him, was where did the speed limit change to 55 mph? He said "it didnt the speed limit is 65 mph" I said then whats the problem, his clame is that I was doing 80 mph. At the time I had been traveling for 2.5 hours, the first leg of my jurny was on 70 mph interstate and then the road I was on that was a 65 mph highway. I had been watching my GPS for some time and it consistantly was reading 67.4 mph, and showed a Max speed for the duration of my trip at 74.6 mph. He of course did not want to hear that and wrote me a ticket any way. My delema is wheather to challange him and his radar unit in court or not. I understand all of the legal implications of going to court, I am just looking for some good documintation on which to base my defence, in referance to GPS techonolegy and it's accuracy.