Who is liable for a “dooring” incident in California?

Dooring remains one of the most common and preventable causes of bicycle injuries in California. This is especially problematic in dense urban areas where cyclists ride alongside parked vehicles. California law is clear about who bears responsibility when a driver or passenger opens a vehicle door into the path of a cyclist.

Under California Vehicle Code § 22517, no person may open a vehicle door on the side of moving traffic unless it is reasonably safe to do so and does not interfere with traffic. The statute also prohibits leaving a door open longer than necessary to load or unload passengers. This law applies to both drivers and passengers, and it establishes a clear duty to check for approaching cyclists before opening a door.

Law protects cyclists

Because the statute is designed to protect road users, including cyclists, a violation can support a finding of negligence. When a driver or passenger opens a door without checking mirrors or turning to look for approaching cyclists, they may be held liable for the resulting injuries. This includes situations where a cyclist collides with the door or swerves to avoid it and is injured in the process.

In most dooring cases, liability rests with the person who opened the door. Cyclists cannot reasonably be expected to anticipate which parked vehicles may suddenly open their doors, especially in areas with heavy traffic or narrow bike lanes. The law recognizes that the person inside the vehicle is in the best position to prevent the collision.

Exceptions exist

There are limited circumstances where fault may be shared, such as when a cyclist is riding unpredictably or outside a designated lane. However, these situations are uncommon, and the primary duty still remains with the person opening the door.

For injured cyclists, documenting the scene, identifying the person who opened the door and preserving witness statements are important steps. Because dooring incidents often occur quickly and without warning, early evidence collection can help clarify how the collision occurred and who failed to follow the safety requirements.