Doored on a Bike in California: Who Is at Fault

You were riding past a row of parked cars and a door swung open in front of you. There was no time to brake. Now you have a sore shoulder or worse, a bent wheel, and someone telling you that you should have been riding farther out.

This post explains how fault works in a California dooring crash, the arguments the other side is likely to make, and what to do in the first few weeks so the claim holds up.

The rule is written for exactly this crash

Most car-versus-bike crashes turn on a general duty of care. Dooring has its own statute. Vehicle Code § 22517 says:

"No person shall open the door of a vehicle on the side available to moving traffic unless it is reasonably safe to do so and can be done without interfering with the movement of such traffic, nor shall any person leave a door open on the side of a vehicle available to moving traffic for a period of time longer than necessary to load or unload passengers."

Three things about that sentence matter for your claim.

• "No person." The duty is not limited to the driver. A passenger who opens a door into traffic is covered by the same rule.
• "Moving traffic" includes you. Under Vehicle Code § 21200, a person riding a bicycle on a highway has all the rights of a driver of a vehicle and is subject to the same rules. A cyclist is part of the traffic the door opener has to watch for.
• Leaving it open counts too. The second half of the statute covers a door left open longer than needed to load or unload.

The DMV Driver Handbook backs this up in plain terms. It lists "open your car door" among the situations where a driver must check their blind spots, alongside changing lanes and pulling out from the curb.

"I didn't see you" is not a defense

The most common thing a door opener says is that they never saw the bike. That is often true, and it tends to help you.

Section 22517 does not ask whether the person saw you. It asks whether opening the door was reasonably safe. A check of the mirror and a look over the shoulder is what makes it reasonably safe. Not seeing a cyclist who was there to be seen is evidence that the check did not happen, or was not done properly.

What the insurer will argue

Expect the adjuster to try to move some of the fault onto you:

• "You were riding in the door zone." The suggestion is that you should have been farther from the parked cars. The law does not require you to ride where a door can hit you. Vehicle Code § 21202 generally tells slower cyclists to ride as close as practicable to the right edge, but it lists exceptions, including when reasonably necessary to avoid "fixed or moving objects, vehicles" and other hazards. Parked cars with occupants inside are exactly that kind of hazard.
• "You were going too fast." Your speed and whether you had any chance to react are fact questions, not an automatic defense.
• "You were distracted, riding against traffic, or had no lights." These can support a share of fault if they are true and if they contributed to the crash. Headphones, a phone in hand, or riding the wrong way will all come up if there is any evidence of them.
• "The door was already open." This one changes the analysis. If the door had been open for some time and you rode into it, the argument is about whether you should have seen it and whether it was left open longer than necessary under the second half of § 22517. Timing is the whole case here, which is why witness accounts and video matter.

If a car was passing you when the door opened and you had nowhere to go, look at the passing driver too. Vehicle Code § 21760 bars drivers from passing a bicycle at less than three feet. If traffic or the road makes that impossible, it requires them to slow down and pass only when doing so would not endanger you. A car squeezing you toward the parked cars can share responsibility for what happened next.

Who pays

The person who opened the door is generally the one at fault, but "who pays" is an insurance question, and the answer depends on the policies involved.

• Start with the auto policy on the parked car. The crash involved the use of that vehicle. Get the owner's and driver's insurance information at the scene, and the passenger's name and contact if a passenger opened the door.
• If it was a rideshare or delivery car, the coverage picture changes depending on what the driver was doing at the time. Our post on Uber and Lyft accidents walks through the rideshare periods and which policy applies in each.
• Check your own policies too. If you own a car, your auto policy may include medical payments or uninsured and underinsured motorist coverage. Whether they apply to you as a cyclist depends on your policy language, so read it rather than assuming. How that coverage is calculated is covered in hit by an uninsured driver.
• Health insurance can pay your treatment bills in the meantime. Expect your health plan to ask about the crash, because it may seek repayment from any recovery.

If an adjuster says auto coverage does not apply because the car was parked, ask for that position in writing, with the policy language behind it.

What this means in California

• Two years. The personal injury statute of limitations under Code of Civil Procedure § 335.1 is generally two years from the date of the crash.
• Six months for public entities. If the door belonged to a city vehicle, a public agency's truck, or another government vehicle, a formal claim is usually due within six months. The same short deadline can apply if a road hazard owned by a public entity played a part.
• Shared fault reduces, it does not bar. California follows pure comparative negligence. If you were found partly at fault, for example for riding at night with no lights, your recovery is reduced by your share rather than eliminated.
• The statute helps prove fault, not damages. Even with a clear violation of § 22517, you still have to show what your injuries are and what they cost. That comes from your medical records and bills.

What to keep, starting now

• Photos of the car and the door, including its position relative to the bike lane or lane line, and the license plate.
• Names and contact details for the driver, any passenger, and every witness. Dooring crashes happen fast, and a neutral witness who saw the door open is valuable.
• Video. Look for doorbell cameras, storefront cameras, and dashcams on nearby cars. Ask quickly, because some systems record over old footage automatically.
• Your bike, helmet, and clothing, unrepaired and unwashed. Damage to the front wheel, fork, or handlebars helps show how the impact happened.
• The police report number. If officers did not come to the scene, file a report anyway.
• Your medical records from day one. Some symptoms, especially from a head impact, show up late. A gap between the crash and your first visit will be used against you.

When the other side's insurer calls to ask how close you were to the parked cars or how fast you were going, understand that the call is built to produce a fault percentage. Our post on recorded statement traps explains what those questions are fishing for.

Practical next steps

Get checked by a doctor even if you walked away, and follow through on the treatment you are given. Collect the door opener's information and any witness names, request any nearby video right away, and keep your bike and gear as they are. Write down what you remember while it is fresh. If you want someone to look at how fault is likely to be argued in your crash, a consultation with our firm is free and there is no fee unless there is a recovery.