I am Joel Brand, and I defend DUI cases across California. A question I hear more and more is whether you can get a DUI while your car is driving itself. The short answer is yes, in most situations you can. In this post I will explain how California law views self-driving technology, driver-assist systems, and what it means for you if you were arrested for a DUI while using one of these features.
What Does Self-Driving Actually Mean in California
When people say self-driving, they usually mean one of two very different things. The first is a driver-assist system like Tesla Autopilot or Full Self-Driving, also known as Level 2 automation. The second is a truly driverless vehicle, like a Level 4 robotaxi, where no human input is needed at all. California law treats these two categories very differently when it comes to DUI. Understanding which one applies to your situation is the first step in understanding your case.
Level 2 Driver-Assist Systems and the Law
Systems like Tesla Autopilot and Full Self-Driving are Level 2 driver-assist systems. This means the car can steer and accelerate on its own, but the human behind the wheel must stay alert and ready to take over at any moment. Under California law, the human is still the legal driver and remains in actual physical control of the vehicle. The technology is designed to assist you, not replace you. If you are sitting in the driver seat with the system engaged, the law still considers you the one driving.
You Are Still Considered the Driver
This is the most important point I can make. If you are using a Level 2 system, you are the driver. The fact that the car was steering or braking does not change your legal status. California Vehicle Code sections on driving under the influence focus on whether you were driving or in actual physical control. Since you are required to supervise the system and take over if needed, you remain legally responsible for the vehicle. I discuss this concept further in the no-driving defense, which sometimes applies in unusual situations but generally not when you are in the driver seat with the system on.
Can Autopilot or Full Self-Driving Prevent a DUI Charge
No, it cannot. I have had clients who believed that turning on Autopilot before they started drinking, or letting the car drive them home, would protect them from a DUI. It does not work that way. Because Level 2 systems require a licensed, sober human to supervise the driving at all times, using these features while impaired still exposes you to a DUI charge. The law does not recognize driver-assist technology as a substitute for a sober driver.
What About Truly Driverless Level 4 Vehicles
This is where the law gets much less clear. A Level 4 robotaxi is designed to operate without any human intervention. If you are sitting in a robotaxi as a passenger and there is no steering wheel or pedals available to you, the question of whether you can get a DUI is largely untested in California. In that scenario, you would arguably be a passenger, not a driver. However, I want to be very clear that this is not a settled safe harbor. The law in this area is still developing, and you should never assume you are protected just because the vehicle is highly automated.
Actual Physical Control Is the Key Concept
California DUI law often hinges on the concept of actual physical control. Prosecutors look at whether you had the ability to operate the vehicle. In a Level 2 system, you clearly have that ability because you are expected to take over at any moment. The system can disengage without warning, and you must be ready to respond. This means you have actual physical control even when the system is doing the steering. For more on how this works, see the Vehicle Code sections that govern DUI.
Common Misconceptions About Self-Driving Cars and DUI
One common misconception is that turning on Autopilot means you are no longer responsible for the car. Another is that the car can serve as a designated driver. Both of these ideas are wrong and dangerous. A third misconception is that if the car was in full self-driving mode, the police had no reason to stop you. In reality, impaired supervision of a Level 2 system can still lead to erratic driving, swerving, or other signs that give officers probable cause for a traffic stop. You can read about other unusual scenarios in surprising ways to get a DUI.
What Police Look For During a Traffic Stop
When an officer pulls over a vehicle, they are looking for signs of impairment. They do not know, and often do not care, whether Autopilot was engaged. They will observe your eyes, your speech, your balance, and the smell of alcohol. They will ask you to perform field sobriety tests. If they believe you are impaired, they will arrest you for DUI. The fact that the car was partially driving itself will not prevent the arrest. It may come up later in court, but it is not a shield at the roadside.
How the DMV Handles Self-Driving DUI Cases
The DMV operates separately from the criminal court system. After a DUI arrest, the DMV will try to suspend your license through an administrative process. The DMV does not care whether your car had driver-assist features turned on. They care whether you were driving or in actual physical control of a vehicle while impaired. Since Level 2 systems keep you in the driver seat, the DMV will treat it like any other DUI arrest. You can learn more about this process in how the DMV hearing works and how a DUI affects your license.
Potential Defenses in a Driver-Assist DUI Case
Just because you can be charged with a DUI while using Autopilot does not mean the case is automatically proven. There are still defenses available. The prosecution must prove that you were impaired and that you were driving or in actual physical control. Depending on the facts of your case, there may be questions about whether the system was engaged, whether you were truly in control, or whether the traffic stop was lawful. I always review every detail. For a broader overview, see the top DUI defenses and the broader California DUI defenses guide.
The First Steps After a Self-Driving Car DUI Arrest
If you were arrested for a DUI while using a driver-assist system, you need to act quickly. You have only 10 days from the date of your arrest to request a DMV hearing to protect your driving privilege. You should also gather any data or records related to your vehicle system, as this information could be relevant to your defense. The most important thing is to understand your rights and deadlines. I cover this in detail in the first 10 days after a DUI. You can also review the consequences of a first DUI and the California DUI penalties guide to understand what you may be facing.
Every Case Is Different and Outcomes Are Not Guaranteed
I want to be straightforward with you. Every DUI case is unique, and the facts of your situation will determine what defenses are available and what outcome is possible. The information in this post is general and is not a guarantee of any result. Self-driving technology is evolving, and the law is trying to keep up. If you were arrested, the best thing you can do is talk to an attorney who can look at the specific facts of your case and give you honest, practical guidance.
If you were arrested for a DUI in California, whether a self-driving system was involved or not, I offer a free written case analysis on this page. Call me at (888) 271-6644. I answer my own phone, 24/7. You can also read more from the DUI blog.