Many people think that a public defender is not a "real attorney," but that is not true. Public defenders are very experienced in traffic court matters because they do a lot of it! They often have a good feel for the judge and the prosecutor of the court you are in, and can navigate you through the process. If you cannot afford an attorney, but need one to protect your rights, you should not hesitate to apply for a public defender.
For other questions about municipal court, check out the articles on this site. The state also has an excellent web site and a brochure giving you lots of information for your day in court. You should avail yourself of these resources before appearing on your matter.