Definition
An event data recorder (EDR), or 'black box,' is an electronic device installed in most modern vehicles that captures pre-crash data including vehicle speed, brake application, throttle position, and seatbelt status.
In California Rear-End Collision Cases
EDR data is powerful evidence in California rear-end collision cases, particularly against commercial trucks and in high-speed freeway rear-ends. The data establishes the rear driver's speed at impact, whether brakes were applied and when, and whether any safety systems activated. EDR data in the struck vehicle establishes the change in velocity (delta-V). A written preservation demand must be sent to the rear driver and their insurer immediately after the accident to prevent the vehicle from being repaired and the data overwritten.
California Law Context
California rear-end collision law applies this concept within the framework of Vehicle Code Section 21703's rebuttable presumption of fault, the eggshell plaintiff rule, pure comparative fault from Li v. Yellow Cab Co. (1975), the two-year statute of limitations under CCP Section 335.1, and uncapped economic and non-economic damages.
Frequently Asked Questions
What is Event Data Recorder (EDR) in California rear-end collision law?
An event data recorder (EDR), or 'black box,' is an electronic device installed in most modern vehicles that captures pre-crash data including vehicle speed, brake application, throttle position, and seatbelt status.
How does Event Data Recorder (EDR) affect a California rear-end collision claim?
EDR data is powerful evidence in California rear-end collision cases, particularly against commercial trucks and in high-speed freeway rear-ends. The data establishes the rear driver's speed at impact, whether brakes were applied and when, and whether any safety systems activated. EDR data in the struck vehicle establishes the change in velocity (delta-V). A written preservation demand must be sent to the rear driver and their insurer immediately after the accident to prevent the vehicle from being repaired and the data overwritten.
How does this interact with California's pure comparative fault system?
Event Data Recorder (EDR) interacts with California's pure comparative fault system from Li v. Yellow Cab Co. (1975) in rear-end collision cases. Even when Event Data Recorder (EDR) reduces or complicates the plaintiff's claim, California's pure comparative fault allows recovery so long as the plaintiff was not 100% at fault. Recovery is reduced proportionally by any plaintiff fault, but the Event Data Recorder (EDR) principle generally operates to preserve the plaintiff's right to recover.