Sandman is right. I kept all my documentation with me always and could produce them when asked. Chances are 50/50 that the officer will show for court.I went almost without fail( extra o.t.). As to clocking the truck, That may be your best defense.Depending on the antenna the radar cone comes out at a given angle(cone) that increases with distance.If the truck was in that cone, you are good to go. But you better prove it. Just remember one thing. You were speeding. Take the hit and go on.