http://www.tea.state.tx.us/drive/dsinfo.html
TICKET DISMISSAL INFORMATION
If you have a Texas driver license or Permit and meet certain other requirements, Texas state law allows you to dismiss one traffic ticket every 12 months by taking a TEA-approved driving safety (a.k.a. defensive driving or ticket dismissal classes) course.
In order to dismiss a traffic citation by taking one of these classes, Texas law requires the following: you must NOT possess a Commercial Driver License (CDL); you must admit guilt or sign a statement that you do not contest the citation (nolo contendere); and if you were charged with speeding, the citation must state that it was not more than 25 miles above the posted speed limit. There are other criteria, and the court has the final decision on whether you'll be permitted to dismiss the ticket by completing a driving safety course.
Some municipal court judges and justices of the peace require you to contact the court before you take the driving safety course for purposes of ticket dismissal. Be sure to obtain the court's permission first. By contacting the court that is indicated on your traffic ticket, you may prevent delays, added expenses, or a requirement that you repeat the course.