Truck accidents in California can cause serious injuries. After a crash, most people focus on seeing a doctor. This is the right first step. However, important evidence can disappear within hours or days. If someone loses this evidence, proving what really happened becomes harder. Knowing what fades quickly helps you protect your legal rights.
Electronic data and driver records
Large commercial trucks have black boxes called event data recorders. These devices track speed, braking, and engine use. Trucks also use Electronic Logging Devices (ELDs) to track driving hours.
In California, trucking companies must comply with both state and federal laws. You should know that some data only stays in the system for a short time. If the truck goes back on the road, new data can overwrite the old information.
Driver records also change fast. Companies must keep driver logs for six months. They must keep other files, like hiring records, for three years. Once these legal deadlines pass, the company can legally destroy the records unless it receives a formal notice to save them.
Physical evidence at the scene
The crash scene changes quickly. Skid marks on the road fade away. Crews clear debris. Workers fix damaged guardrails. Weather and traffic can erase clues within a few days.
Surveillance footage creates another major concern. Nearby stores or traffic cameras often record crashes. Many of these systems delete video automatically after just a few days. Even the truck itself can change. If a company starts repairs, mechanics may make it hard to check the brakes or tires for mechanical flaws.
Why early action matters
California law usually gives you two years to file a lawsuit. However, if a government agency owns the truck, you may only have six months to file a claim.
Acting early allows a lawyer to send a spoliation letter. This legal notice forces the company to save all data, records, and physical evidence. This step helps preserve the full story before it vanishes.