I fought something like that. I was going 82 in a 65 or something. I was in the fast lane coming out of Albany during rush hour and passing someone when a state trooper pulled me over, on I-90 or something in New York State. Ya'll drive so slow in the USA, I swear. He told me that he had just pulled someone over for going 113 that day, and said that if I was going 80 or so, he wouldn't have bothered pulling me over. I told the officer that I had never had a ticket before, but he slapped me with a ticket anyway. I looked at the charge and did some research & conversions online, and it would have been an equivalent of 3-4 demerit points on my driving record. Being under 25 years old, that would have screwed my car insurance payments as it is. I called my car insurance to inquire and confirm about a speeding ticket and how it would affect my payment rates, and if Transport Canada would be able to see a violation on my record (because in certain States, it does not show up). So anyway, I found a traffic law firm that would take care of my case for me. I signed a Plea of Absentia, since I was unable to make an appearance in court (and typically the officer who slapped you with the ticket can't make it either, so the case folds) and I entered a plea of not guilty along with a personal letter that I attached with my account of what was said and the circumstances surrounding the violation. I won my case, and my violation was reduced to some kind of moving violation, the equivalent of a parking ticket. It was worth hiring a lawyer for, in my case, since I take a lot of pride in my driving record and need to keep it clean for insurance purposes, and it was worth it. I suggest that you look online for a good lawyer, and see if it's worth it for you. I ended up finding a terrific law firm and spoke with this guy over the phone who walked me through the process since the entire NY State traffic ticketing system was totally new to me. Start making some phone calls.
Hahaha, yeah I'm pretty stubborn about it too. I asked the officer who pulled me over, "So, do you always pull people over for going 82?" And that's when he told me that he wouldn't have stopped me if I was going under 80. I then said "I don't have cruise control in my car sir, and it's a little hard to tell if I'm going 80 on the nose with my odometer needle and the MPHs in small." My car is in Kilometers, and in smaller print you can see the MPHs, but they're only measured by 5MPHs. Hahaha, I have this really bad habit of talking back to policemen. But it was the second last day of the month, and I knew this guy needed to make his quota, so he slapped me a ticket anyway. Jerk.
He did use radar, he didn't lock in the speed. There were only two other cars around, one going as fast as me, and going a little less about to turn (Which I got behind because I was going the same way). With my luck the cop went after me. Like I said I have heard many stories on people getting off on the cop not remembering good enough or calibration testing. Most of my family has a pretty bad record with tickets and all police in general, and they say if you are ever going to contest a ticket, do it from the start since once you have a record it is much harder.