To fight a 100 mph ticket in California, you plead not guilty at the mandatory arraignment, subpoena the citing officer’s notes and the calibration records for the radar or lidar unit used against you, and then use those records at trial to challenge whether the prosecution can actually prove your speed was over 100. A charge under Vehicle Code 22348(b) cannot be paid off by mail, is not eligible for traffic school, and carries a possible license suspension, so the process runs through the courtroom whether you want it to or not.
Know What You’re Up Against Before You Plead
A 22348(b) violation is not a normal speeding ticket. It requires a mandatory court appearance, meaning you or an attorney must physically show up before a judge. Ignoring the court date creates a separate misdemeanor charge under Vehicle Code 40508 for failure to appear, which carries its own penalties including potential jail time.1California Legislative Information. California Code VEH 40508
Traffic school is off the table. California generally limits traffic school to violations where the driver was not exceeding the limit by more than 25 mph, and 100-plus mph is well past that. A conviction posts two DMV points to your record. On a first offense, the court may suspend your license for up to 30 days, but the suspension is discretionary; some judges impose it routinely, others reserve it for aggravating facts like excessive speed or dangerous road conditions.2California Legislative Information. California Code VEH 13200.5 On a second conviction within three years, suspension becomes mandatory for six months (or a six-month work-only restriction); on a third within five years, one year.3California Legislative Information. California Code Vehicle Code 13355
All of that is the reason to fight, but the fight itself is a sequence of concrete steps.
Step 1: Enter a Not Guilty Plea
Your first court date is the arraignment. The judge reads the charge, explains your rights, and asks for your plea. To fight the ticket, you plead not guilty, and the judge sets a separate trial date.4California Courts. Traffic Court Trial
You can enter that plea two ways. The straightforward option is showing up in person at the arraignment; if you appear and plead not guilty for a standard court trial, bail is generally not required at that stage. California law also allows you to plead not guilty in writing before the court date by sending a certified letter to the court, but you must include a bail deposit equal to the full fine amount with that letter.5California Legislative Information. California Code VEH 40519 Bail, when posted, is refunded if you’re acquitted and applied to the fine if you’re convicted.
Step 2: Subpoena the Officer’s Notes and the Device Records
Once the plea is entered, the actual defense is built from documents. The two you need are the citing officer’s notes and the calibration and maintenance records for whatever device measured your speed, whether radar or lidar.
For traffic infractions, the formal criminal discovery rules don’t apply the same way they do in felony cases. The reliable path is to subpoena the records through the court by filing a court order requiring the law enforcement agency to produce documents. The relevant forms are the Order to Attend Court or Provide Documents (CR-125) and, if you need specific records brought to the hearing, the Affidavit for Subpoena Duces Tecum. Many defendants also send an informal written request to the agency or prosecutor’s office first; that sometimes produces the records without a subpoena, but the subpoena is the guaranteed method.
What you’re looking for is as important as having the records at all. The calibration logs should show regular testing and certification of the device on the manufacturer’s schedule. Incomplete records, or a unit that was overdue for service, is a legitimate basis to challenge the accuracy of the reading. The officer’s notes should describe traffic conditions, the distance at which the reading was taken, and how your vehicle was identified. Gaps in the notes create room for cross-examination.
Step 3: Attack the Speed Reading, Not the Fact of Speeding
The strongest defenses against a 100 mph ticket don’t involve claiming you weren’t speeding. They focus on whether the prosecution can prove you were going over 100. That distinction matters because a successful challenge to the evidence can bring the finding down to a lesser speed and take you out of Vehicle Code 22348(b) entirely.
- Challenging device calibration. If the agency can’t produce calibration records, or the records show the unit was overdue, the speed reading becomes unreliable. This is where self-represented defendants most often find their best openings.
- Questioning the officer’s training. Officers must be trained and certified on the specific device they used. If the officer can’t demonstrate adequate training on that model, the reading is suspect.
- Target identification problems. Radar and lidar can lock onto the wrong vehicle, especially in heavy traffic. If you were driving among other cars, the officer has to explain how they confirmed the reading was yours.
- Pacing or visual estimation errors. If the officer paced you rather than using a device, accuracy depends on a consistent following distance. Visual estimates are subjective and harder to defend under cross-examination.
What Happens at Trial
At trial, the citing officer is the prosecution’s primary witness. The officer testifies about what they observed, the method used to measure your speed, and the conditions at the time. You have the right to cross-examine, and this is where the preparation pays off. Missing calibration records, thin notes, or any inconsistency between the written report and the live testimony are the moments to press.
After the prosecution rests, you present your defense. You can testify on your own behalf, call witnesses, and introduce evidence such as photographs of the location, your own vehicle’s speed data if the car logs it, or expert testimony about the limits of the measuring device. You then make a closing argument to the judge, who decides the verdict. There is no jury for traffic infractions in California.
One tactical point worth knowing: the officer has to show up. If the citing officer fails to appear at trial, you can ask for a dismissal. It happens more often than people expect when the trial date lands on the officer’s day off or conflicts with their schedule. It isn’t a strategy you can rely on, but it’s a real possibility.
Trial by Written Declaration
California allows some traffic infractions to be resolved through a trial by written declaration, where both you and the officer submit written statements and a judge decides without anyone appearing in person.6California Courts. Trial by Written Declaration Because a 100 mph violation requires a mandatory court appearance, this option is not automatically available. Some courts allow it; many will not. If you request it and the court finds you ineligible, the clerk must extend your due date by 25 calendar days and notify you.7Judicial Branch of California. California Rules of Court Rule 4.210
If the court does grant it, you post the full bail amount upfront and submit your written defense on the required court form. The officer’s agency receives a notice to submit the officer’s declaration by a specified date. If the officer never submits one, the judge decides the case on your statement alone, which often results in a not-guilty finding.
The real advantage is the built-in safety net. If you lose the written declaration, you have 20 calendar days from the mailing of the decision to request a trial de novo, which is a brand-new in-person trial with a different judge.7Judicial Branch of California. California Rules of Court Rule 4.210 You can present new evidence and witnesses at the trial de novo. You effectively get two chances to win.
Aim for a Reduction If a Dismissal Isn’t Realistic
Even when the defenses above don’t produce an outright dismissal, they can support a negotiated reduction. Some courts allow the charge to be reduced to a standard speeding violation, which lowers the fine, eliminates the license suspension risk under 22348(b), and may restore traffic school eligibility. The outcome isn’t guaranteed and varies by courthouse, but it becomes realistic when the prosecution’s evidence has identifiable weaknesses.
CDL Holders Should Not Handle This Alone
If you hold a commercial driver’s license, a 100 mph conviction carries federal consequences on top of California’s. Under federal regulations, speeding 15 mph or more over the posted limit is a “serious traffic violation” for CDL holders, and it applies whether you were driving a commercial vehicle or your personal car. A second serious violation within three years triggers a 60-day CDL disqualification; a third within three years, 120 days.8eCFR. 49 CFR 383.51 – Disqualification of Drivers
A single 100 mph conviction won’t disqualify a CDL by itself, but combined with any other serious violation inside three years, the consequences are career-threatening. CDL holders have the strongest incentive to either fight the ticket aggressively or retain an experienced traffic attorney to do it.