If you get it, just pay it. Fighting it won't do much good.
I remember my last ticket was by a state trooper of in Camden. I had passed a logging truck that was blowing debri everywhere and did exceed the speed limit while passing. The trooper come over the far hill just as i was pulling back into the lane. I tried to explain and he said, I would have to take it up with the Judge. When i got to court, the trooper wasn't there due to his baby being born. the judge said we either had to pay it or come back. Being the stubborn guy I am i plead not guilty and made the 45 minute trip a second time. Technically the judge wasn't supposed to do that but he did. When i came back I plead my case and the judge simply said did you exceed th speed limit, to which I replied yes and tried to explain why. He wouldn't even hear it, even though I pointed out (nicely, not belligerently BTW) that the TN driver manual said it was perfectly acceptable what I did. Long story short. Pay it and save the frustration of injustice for bigger fish.
Funny how the concept of laws designed to serve us end up being served by us.