It has to go to court to be challenged. If you don't pay within 21 days, the police will start the court process. 

Preparing for a traffic violation hearing involves careful consideration of legal aspects, gathering relevant evidence, and understanding the specific details of your case. Here are steps to help you prepare:

1. Carefully read the traffic citation to understand the specific violation you are charged with and the details surrounding the incident.
    
2. Familiarize yourself with the traffic laws relevant to your case. Know the rules and regulations associated with the alleged violation.
    
3. Collect any evidence that may support your case. This could include photographs, witness statements, or any documentation proving that you were not in violation or had a justifiable reason for your actions.
    
4. If possible, seek advice from an attorney. They can provide guidance on the legal aspects of your case, potential defenses, and help you navigate the court process.
    
5. Outline what you intend to say during the hearing. Be concise and focus on relevant details that can help your case. Avoid unnecessary information that may distract from your main points.
    
6. Bring all relevant documents to the hearing, including your driver's license, registration, insurance information, and any evidence you've collected.
    
7. Present yourself in a professional manner. Dress appropriately for the courtroom to convey respect for the legal proceedings.
    
8. Plan to arrive at the courthouse well before your scheduled hearing time. This allows you to go through security, find the correct courtroom, and be prepared.
    
9. Show respect to the court officials, including the magistrate, opposing counsel, and any witnesses. Maintain a calm and composed demeanor throughout the proceedings.
    
10. Pay close attention to what is being said during the hearing. If you don't understand something, don't hesitate to ask for clarification.