Key Takeways: Who is at fault in a self-driving car accident in California depends on what was driving the car. If a driver-assist system like Tesla Autopilot was on, the human driver is usually responsible. If a fully driverless car like a Waymo caused the crash, the company operating it usually is. A carmaker can share the blame when a defect played a part.
The car that hit you had nobody in the driver’s seat. Or maybe it did, and the driver swears the car was steering itself. Either way, you are the one with the sore neck and the crumpled bumper, and every adjuster you talk to points somewhere else. California actually has clearer rules on this than most states. The answer starts with one question: was a person supposed to be driving that car, or was the car legally driving itself?
“Self-Driving” vs. “Autonomous”: What California Law Actually Covers
Under California Vehicle Code 38750, an autonomous vehicle is one with technology that can drive without the active physical control or monitoring of a human, meeting SAE Level 3, 4, or 5 automation. The same statute expressly leaves out driver-assist features that cannot drive the car without a person monitoring it. Its examples include adaptive cruise control, lane keep assist, automatic emergency braking, and park assist. In other words, most cars sold with “self-driving” features are not autonomous vehicles under California law. A Tesla running Autopilot or Full Self-Driving (Supervised) is a driver-assist car, and the person behind the wheel is expected to watch the road and take over. A Waymo robotaxi with nobody in the driver’s seat is a true autonomous vehicle, and responsibility moves toward the company that runs it.
| Automation level | Who is driving | Example | Who usually answers for a crash |
|---|---|---|---|
| Level 2 (driver assist) | The human, with help steering and braking | Tesla Autopilot, Full Self-Driving (Supervised) | The human driver, plus the carmaker if a defect contributed |
| Level 3 (conditional) | The car, in limited conditions, with a human ready to take over | Systems that hand control back when they reach their limits | Depends on whether the car or the human was in control at impact |
| Level 4 and 5 (driverless) | The car, with no human driver needed | Waymo robotaxis | The company operating the vehicle, plus any defective parts or software supplier |
The statute also defines the “operator” as the person in the driver’s seat or, if nobody is sitting there, the person who causes the autonomous technology to engage. In a robotaxi, the rider in the back seat orders a trip. The company runs the driving system.
Who Is at Fault in a Self-Driving Car Accident: 6 Common Scenarios
| What happened | Who is usually at fault | Why |
|---|---|---|
| A Tesla on Autopilot rear-ends you | The Tesla driver and their auto insurer | Level 2 systems require a driver who is paying attention |
| A driverless Waymo hits your car, or hits you while you are walking or biking | The company operating the robotaxi | No human was driving. The company’s system was |
| A test vehicle with a safety driver crashes | The testing company, and possibly the safety driver | California requires test drivers who can take immediate manual control |
| A human driver crashes into a self-driving car | The human driver | Ordinary negligence rules still apply to everyone else on the road |
| A sensor, camera, or software failure causes the crash | The manufacturer or parts and software supplier | Product liability covers defective designs and parts |
| A broken signal or dangerous road design contributes | A city, county, or state agency may share fault | Public agencies can be liable, but on a 6-month claim deadline |
The trickiest cases sit in the middle of that table. A driver-assist car may beep and flash a warning for the human to take over a few seconds before impact. If the driver was looking at a phone, most of the fault lands on them. If the system gave no warning, or gave one too late to react, the argument shifts toward the carmaker. Being hit by another driver does not change because the car you were in drove itself. If you were riding in a Waymo and someone ran a red light into it, the driver who ran the light is responsible, the same as in any other crash. Our guide to who is liable in an Uber or Lyft accident covers how that works when you are a paying passenger.
How California Splits Fault Between People and Machines
California uses pure comparative fault, a rule the California Supreme Court adopted in Li v. Yellow Cab Co. (1975). Every party who contributed to a crash, including the injured person, is assigned a percentage of the blame. Each person’s recovery is reduced by their own share rather than wiped out. Say a robotaxi company is found 60% at fault for a software error and another driver is 30% at fault for speeding. The injured person is 10% at fault for crossing against the signal. That person still recovers 90% of their damages. One more rule matters when several companies are involved. Under Civil Code 1431.2, each defendant pays only its own percentage of non-economic damages, like pain and suffering. Economic damages, such as medical bills, can be collected from any one defendant in full. That is why naming every responsible party in a self-driving car accident, not only the most obvious one, changes how much actually gets paid.
When the Carmaker Pays: Product Liability and the Tesla Autopilot Verdict
California holds manufacturers strictly liable for defective products, meaning an injured person does not have to prove the company was careless, only that a defect caused the harm. In self-driving cases, that usually means one of three things:
- A design defect, like software that does not recognize a stopped vehicle or a pedestrian at night
- A manufacturing defect, like a faulty sensor or camera on one particular car
- A warning defect, like instructions or marketing that leave drivers thinking the car can handle more than it can
Juries are taking these claims seriously. In August 2025, a federal jury in Miami found Tesla 33% responsible for a 2019 Autopilot crash in Key Largo, Florida. The judge upheld the $243 million judgment in February 2026. Tesla has said it will appeal, and a Florida verdict does not bind California courts. It does show that a jury will put part of the blame on software when the evidence supports it. Product cases like these are handled by product liability lawyers because they are built very differently from a fender bender.
The Evidence That Decides Fault
Self-driving cars record far more than the average car, and California law requires some of it to be kept.
- Sensor data. Vehicle Code 38750 requires approved autonomous vehicles to capture sensor data from at least 30 seconds before a collision, store it in read-only form, and keep it for three years.
- DMV crash reports. A company testing autonomous vehicles must report any collision involving injury, death, or property damage to the DMV. The report goes on form OL 316 within 10 days, under Title 13, Section 227.48 of the California Code of Regulations.
- Police notices. Since July 1, 2026, a state law known as AB 1777 lets officers issue notices of noncompliance to driverless car companies when their vehicles break traffic laws. The companies must report those notices to the DMV.
- The usual evidence. Police reports, dashcam and business camera video, witness statements, and photos of the scene still matter as much as they do in any crash.
The company holds most of the vehicle data, which is why it needs to be requested in writing quickly. If you were hurt, these steps protect your claim:
- Call 911 and get medical care, even if you feel fine at the scene.
- Photograph the vehicles, any company markings, the plate, and the road.
- If a robotaxi was involved, screenshot the trip or note the time and location to the minute.
- Get names and numbers from witnesses and any human driver.
- Do not give a recorded statement to the company or its insurer before talking to a lawyer.
How Long You Have to File in California
Most personal injury lawsuits in California must be filed within two years of the crash under Code of Civil Procedure 335.1. If a city vehicle or a dangerous public road was involved, a written government claim is due within six months under Government Code 911.2. Talking to the company or its insurer does not pause either deadline.
Final Thoughts
There is something unsettling about being hurt by a car that nobody was driving. It can feel harder to be angry at, and harder to explain to the people around you. The technology is new, but the question underneath it is old. Someone made a choice that led to the crash, whether it was a driver who stopped paying attention or a company that put a car on the road. Figuring out who that was is what the rest of the process is for.
Pyramid Legal: Holding Self-Driving Car Companies Accountable in Los Angeles
If you were hurt by a Waymo, a Tesla on Autopilot, or any automated vehicle in Los Angeles or anywhere in Southern California, our attorneys can lock down the vehicle data and identify every party at fault. Then we fight for the full value of your claim. You get 24/7 direct access to an attorney and pay no fees unless we win. Visit us at 500 S Grand Ave, Suite 1610, Los Angeles, CA 90071, call 818-946-0763, or learn more about our Los Angeles self-driving car accident lawyers. Get a Free Case Evaluation Today Want to know how carmakers can share the blame in other crashes? Read who is liable in an electric vehicle accident. This article provides general information about California law and is not legal advice about your specific matter. Reading it does not create an attorney-client relationship.
Frequently Asked Questions
Does my own car insurance cover me if a driverless car hits me?
Is the Tesla driver still at fault if Full Self-Driving was turned on?
Can a passenger in a Waymo be blamed for a crash?
Can police give a ticket to a driverless car in California?
Not a traditional ticket. Since July 1, 2026, California police can issue a notice of noncompliance under AB 1777 to the company that operates a driverless car when it breaks a traffic law. The company must report those notices to the DMV, and they can become evidence in an injury claim.
