If you are convicted at a jury trial, your chances of successfully appealing are very small. That's because in the vast majority of states, you do not have the right to a new ("de novo") trial. Instead, an appellate court will simply look to make sure that the trial court judge followed the law (called an appeal "on the record" or "on the law"). Even then, the judge has to make a pretty big error to catch the attention of an appeals court and reverse your conviction. Given the fact that, even for those who know how to do it, the appeals process is complicated and expensive, appeals rarely make sense for traffic cases.