Bicycle accident claims in California
A cyclist on a California road has, with narrow exceptions, the same rights and duties as the driver of a vehicle. Enforcing that on paper after a collision is a different matter, because the first argument is almost always that the cyclist should not have been there.
The rules drivers break
Dooring is the quintessential urban cycling injury and one of the most clear-cut liability cases in this area of law. The cyclist did nothing but ride past a parked car. Insurers nonetheless argue the cyclist should have anticipated the door, which is an argument about the duty of a person who could not see into the vehicle.
Where the cyclist is supposed to ride
Expect to be told you were riding in the wrong place. The actual rule is narrower than drivers believe.
Those exceptions swallow most of the rule in real traffic. A standard traffic lane is not wide enough for a car to pass a bicycle with three feet of clearance while both stay in it, which means taking the lane is frequently the lawful and safer choice — and is exactly what gets cyclists blamed.
On helmets: California requires them only for riders under 18 (Veh. Code § 21212). An adult not wearing one has broken no law, though the argument about head-injury damages mirrors the motorcycle analysis.
Proving it when there is no vehicle damage
A car that strikes a cyclist often has barely a mark on it, which insurers use to imply the impact was trivial. It was not trivial; the energy simply went into the cyclist instead of the sheet metal.
- Keep the bicycle and the helmet exactly as they are. A cracked helmet, a taco'd wheel and a bent fork are physical evidence of force. Do not throw them out and do not let the insurer take them without a record.
- Photograph your injuries over time. Road rash looks worst on day three, not day one.
- Get the ride data. A head unit or phone app records speed and position, which answers questions about where you were and how fast far better than memory.
- Look for cameras. Urban collisions are often captured by a doorbell, a bus, a storefront or a passing car. That footage is routinely overwritten within days.
Questions people ask
I was doored. Whose fault is that?
Almost always the person who opened the door. Vehicle Code section 22517 prohibits opening a door into traffic unless it is reasonably safe to do so. The duty sits with the person inside the vehicle, who can see out, rather than the cyclist, who cannot see in.
There was a bike lane and I was not in it. Does that make it my fault?
Not automatically. Vehicle Code section 21208 allows a cyclist to leave a bike lane to overtake, to turn left, to avoid hazards — including debris, drains, parked cars and the door zone — and to approach a right-turn location. Bike lanes painted inside the door zone are common, and avoiding that hazard is a lawful reason to be out of it.
The driver's insurer says the car is barely damaged so I cannot be hurt.
That argument makes sense between two cars and none at all between a car and a bicycle. There is no structure to absorb the impact, so the energy goes into the rider. Medical records and imaging answer this; the state of the bumper does not.
I was not wearing a helmet. Does it matter?
You broke no law if you are 18 or over; California only requires helmets for under-18s. An insurer may argue it affected head-injury damages specifically, and that argument has nothing to do with a fractured wrist or a broken collarbone.
Related
Reviewed October 2026 by Simon Aziz Budhwani, Esq., the attorney responsible for this site. Legal statements here name the California code section they rely on, so you can check them rather than trust them. This is information about the law in general, not advice about your situation.
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