Kevin was correct in his comment about getting your speedo re calibrated, and bringing in a reciept to prove it. most times a judge will reduce the chrage to what you thought you were doing. If the cop was using a Laser gun, which is what all departments in my area use now, you chances of beating that charge are about as good as winning the lottery. radar is now usually mounted in the car somewhere and can read out on an overhead display, or in some cases on a computer screen. If a cop has written enough tickets, he can write you a speeding ticket in Georgia by simply watching you drive past him, and estimating your speed. you can go to court and fight it of course, but of all the times i have seen it done, the speeder lost. You have every right to view the calibration certification of the laser gun itself, in georgia anyway, but your chances of the cop cutting you a break by say, writing the ticket for less than how fast you were actually going drop quite a bit.