Don't argue/contest, say you didn't realize that you were going that fast, don't drive over the speed limit as a rule (you can only say this if you have a clean record, they will check). If you were going down hill, cite the hill (not an excuse, but just being honest). I went through a radar trap going 82 in a 65 zone years ago. Went to court to hopefully get it reduced, they presented all of the information......time of day....officer badge #...weather condition...mile post....radar gun #, last calibrated on....by officer badge #........I said that everything that was presented in court was true, I have a clean driving record, was driving down hill (I was), didn't realize I was going that fast. I will certainly use this as a wake up call, and be more cautious. Judge ruled that I be found guilty of speeding at an adjusted speed 9 miles lower that the original amount reported, felt that the summons issued served as an important learning experience for me, believed that I was a conscientious driver.