After a California car crash, you might remember only fragments of the moments before impact. If your vehicle has an event data recorder (EDR), often called a car’s “black box,” it may preserve information that helps fill in the gaps.
The available information varies by recording system, but the recorded details can include these five types of data:
1. Vehicle speed
The device can show how fast your vehicle was traveling shortly before impact, allowing investigators to compare this information with road conditions, damage patterns and witness statements.
2. Brake status
Some EDRs record whether you pressed the brake pedal before the crash, which can help establish when you reacted to another vehicle or road hazard.
3. Steering input
Some systems preserve the steering wheel’s position shortly before impact. This information can help investigators evaluate lane changes or attempts to avoid the collision.
4. Change in velocity
An EDR may measure how sharply your vehicle’s speed changed during the crash, providing details about the direction and severity of the impact.
5. Restraint system status
The device may show whether the driver’s seat belt was buckled and whether an air bag deployed. The exact details depend on the vehicle’s recording system.
What to know before relying on EDR data
Downloading EDR information generally requires specialized equipment and software, and a trained professional may need to interpret the report. California Vehicle Code Section 9951 generally limits access by anyone other than the registered owner unless the owner consents, a court orders retrieval or another exception applies. Repairs, sale or disposal of the vehicle may also make the information harder to obtain.
An EDR report may clarify important details, but it cannot tell the complete story or determine fault on its own. Timely legal guidance may help you address access, preservation and interpretation while considering the report alongside other crash information.