Good luck. I got a speeding ticket for not speeding around Fullerton, CA. Good ole highway Popo.
Anyway, those guys get paid overtime for showing up to fuck you over in court. Basically it becomes your word against the officers and the officer has way more credibility going into the courtroom (unfair), so the judge usually just throws the book at people.
When I got my speeding ticket for not speeding, I told the judge, "Your honor, the reason I'm contesting the citation this officer had given me was because I was merely cruising that morning because I was running a little early, I wasn't following to closely or weaving in and out of traffic, I was just cruising at traffics speed, and even if I did want to reach the speed limit on the citation I'd have to be pretty ambitious as opposed to just idly cruising."
The judge just kind of smiled and said, "Yeah well you'll get plenty of speeding ticket in your life don't think too much of it. Tell you what, I'll let you change your plee to guilty and I'll lower the fine."
"I would Your Honor but then I'd be a liar."
I got fucked by the entire system two times sideways, good thing it was just a speeding ticket. But seriously, everything you say can easily be negated by the officer going, "nuhuh". So basically the best way to beat a speeding ticket is if the officer doesn't show up. Which is more common if they are a city cop.
Best of luck.