In Houston I have gone to my first court appearance for traffic tickets and pleaded "Not Guilty". What they then do is reschedule for another court date where the citing or issuing officer has to show with original paperwork.
Every single time, approximately half of a dozen times, for myself the officer has not showed up, case dismissed.
My old roommate's teenage daughter got a ticket for setting off fireworks within city limits last New Years, on our driveway. She did the same thing, went and plead "Not Guilty", reassigned and the cop was a no show, case dismissed.