With newer vehicles now storing far more electronic crash information than they did even a few years ago, "black box data" is not a hidden camera or a recording of everything said inside the car. In most wreck cases, it means information from an event data recorder or similar onboard system that captures technical details right before, during, and sometimes after a crash.

That data can include speed, braking, throttle position, steering input, seat belt use, airbag deployment, and how hard the vehicle was hit. On dangerous South Carolina roads like I-26, I-85, US-501, or foggy stretches of US-17, those details can help accident reconstruction experts sort out whether a driver slammed the brakes, drifted, sped up, or never reacted at all. It is one piece of evidence, not the whole story.

For an injury case, black box data can strongly affect who is blamed and how much a claim is worth. It may support your version of events, or it may be used against you in a personal injury claim or wrongful death case. South Carolina follows modified comparative negligence rules, meaning an injured person who is more than 50% at fault cannot recover damages. Because vehicles may be repaired, sold, or destroyed, a lawyer may send a preservation letter or use a subpoena quickly to prevent loss of this evidence.