Generally if the officer testifies about one violation and it does not support the facts of the charged violation you should be found not guilty. However, more information is needed to answer your question and you need to hire competent traffic ticket defense counsel.
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This answer does not constitute legal advice and no attorney client relationship is created. Every case has many facts which are different and distinctly theirs, make sure that you understand this is general information and it would be advisable to constact a competent lawyer for personal legal advice.