Most people picture a DUI the same way: a car, a highway, and a few too many drinks. But California's impaired-driving laws reach further than that, and every year I talk to people who are shocked to be facing a charge for something they never imagined counted. I am Joel Brand, and I defend DUI cases across California. Here are some of the more surprising ways people end up charged, and where the law is actually more nuanced than it first appears.
1. Riding a bicycle
California has a specific law against riding a bicycle while under the influence. It is not the same statute as a vehicle DUI, and the penalties are different and generally lighter, but it is a real charge that can show up on your record. People who deliberately leave the car and bike home to be responsible are sometimes stunned to be stopped anyway. The details, including how these cases differ from a standard DUI, are in DUI on a bicycle or scooter.
2. An electric scooter or e-bike
The explosion of rental scooters and electric bikes created a whole new category of confusion. Depending on the device and how it is classified, riding one while impaired can lead to a charge. The line between a bicycle, an e-bike, and a motor vehicle is not always intuitive, and that classification can matter a great deal to what you are charged with. I cover this in the same guide on scooters and bicycles.
3. Sleeping it off in your parked car
This one feels deeply unfair, because the person was trying to do the right thing. You realize you should not drive, so you pull over or stay in the lot and sleep. California requires actual driving for a DUI conviction, but officers often build a circumstantial case from a warm engine, the keys in the ignition, or your own statements about when you drove. The good news is that the same facts that worry you can also be the basis of a defense. See sleeping in your car.
4. On private property or in a parking lot
A common myth is that a DUI only applies on public roads. It does not. California's DUI laws can apply on private property, including a parking lot or even your own driveway, because the statute is not limited to public highways. People are caught off guard moving a car a few feet in a lot. The nuances are in DUI on private property or a parking lot.
5. On prescription medication you took as directed
You do not have to break any drug law to get a DUI. If a medication impairs your ability to drive safely, you can be charged even if you took it exactly as your doctor prescribed and even if it is completely legal. Sleep aids, anxiety medication, painkillers, and muscle relaxants are common culprits. Because there is no simple number to measure, these cases turn on contestable evidence of impairment, which I explain in how prescription drugs affect your DUI defense.
6. On legal cannabis
Cannabis being legal to use does not make it legal to drive impaired. You can be charged with a DUI for driving under the influence of marijuana, and because California has no per se limit for cannabis, these cases rely heavily on officer observations and a Drug Recognition Expert evaluation rather than a clean number. That makes them very contestable. The framework is in marijuana DUI in California.
7. On a boat
Boating under the influence is its own offense in California, and the limit for operating a vessel is the same 0.08 percent that applies to cars. A relaxing day on the lake or the bay can end with an arrest, and enforcement increases on summer holiday weekends. The specifics are in boating under the influence.
8. With a blood alcohol under 0.08
The 0.08 percent limit is widely treated as a magic line, but it is not a safe harbor. You can be charged with driving under the influence under Vehicle Code 23152(a) based on actual impairment even with a lower reading, and drivers under 21 face a near-zero-tolerance rule explained in underage DUI and zero tolerance. The number is evidence, but impairment is the real question.
9. On a golf cart, a motor scooter, or almost anything with a motor
California's DUI laws are written around vehicles broadly, not just cars and trucks. People have been charged for operating golf carts, mopeds, and other small motorized vehicles while impaired. If it has a motor and you are operating it on the wrong side of impairment, do not assume it falls outside the law.
Why the unusual cases are worth fighting
When a charge falls into one of these surprising categories, the prosecution often has a harder job than in a routine traffic-stop DUI. Proving that you actually drove, that a particular device counts as a vehicle under the law, or that you were genuinely impaired rather than simply tired or unwell can be far from straightforward. Officers in these situations sometimes stretch the facts to fit the charge they have in mind, and a careful review of the report against the body-camera video and the physical evidence can expose the gaps. The same is true when a case rests on drugs without a clean number, where the field sobriety evidence and a Drug Recognition Expert evaluation are both contestable. Unusual does not mean hopeless. More often it means the proof is thinner than it first appears, and that is exactly the kind of weakness a defense is built on.
The common thread
The thread running through all of these is that California's impaired-driving laws are broader than the stereotype, and they are about impairment and operation, not just a car on a freeway. The flip side is that these unusual cases are often the most defensible, because the proof of driving, of impairment, or of the device's classification is frequently weak. If you are facing any version of this, do not assume it is a lost cause. Read the top California DUI defenses, then get a free written case analysis below, or call me directly at (888) 271-6644. I answer my own phone, 24/7. You can also read more from the DUI blog.