If you drove through the section near the SR16 interchange, that is the 40mph stretch he clocked you in. That section is well marked in both direction on streetviewmap so if you did not know the speed limit that is your fault. He states your car was the only one in the beam. You would need compelling evidence, besides your testimony that this is untrue. Also, the standard for conviction is not reasonable doubt but preponerance of the evidence which makes it harder for the defendant to win. As Searcher said we would need to see the officer’s statement to see if other defenses are possible.

