Key Takeaways
- Federal rules only require trucking companies to keep many records for limited periods, some as short as three to six months.
- Black box data and dashcam footage can be overwritten when a truck goes back into service.
- Trucking companies often send investigators to the scene within hours.
- A preservation letter puts the company on notice to keep evidence, and destroying it afterward can lead to court penalties.
- Keep your own damaged vehicle, too. It's evidence.
In most car accidents, the key evidence is the scene, the vehicles, and the people who saw what happened. Truck accidents involve all of that, plus a trail of electronic data and company records that can show exactly what went wrong: how long the driver had been on the road, how fast the truck was going, and whether the brakes were maintained.
That evidence can make or break a truck accident case. The problem is that much of it doesn't last. Some of it can disappear in a matter of days.
Trucking Companies Move Fast After a Crash
Many trucking companies and their insurers have teams ready to respond to serious crashes, sometimes arriving at the scene within hours. Their job is to gather information and protect the company. They may photograph the scene, interview witnesses, download data from the truck, and begin building a defense before the injured person has left the hospital.
There's nothing unusual about a company investigating a crash. But it means the injured person is starting behind, and waiting makes the gap wider.
What Disappears, and When
Federal Motor Carrier Safety Administration (FMCSA) rules require trucking companies to keep certain records, but only for set periods. Once those periods pass, the records can be lawfully discarded unless the company has been told to preserve them.
| Type of record | General minimum retention |
|---|---|
| Driver inspection reports (pre- and post-trip) | 3 months |
| Hours-of-service records and supporting documents | 6 months |
| Negative drug and alcohol test results | 1 year |
| Truck maintenance and inspection records | 1 year while the carrier controls the truck, and 6 months after |
| Accident register | 3 years |
| Driver qualification file | Length of employment, plus 3 years |
| Positive drug and alcohol test results | 5 years |
These are minimums under federal rules. Some companies keep records longer, but you can't count on it.
Electronic Data Can Be Overwritten
Some of the most important evidence isn't in a file cabinet at all.
The black box. Most commercial trucks have an engine control module that can record speed, braking, throttle position, and other data in the moments around a crash. If the truck is repaired and put back on the road, that data can be overwritten.
Electronic logging devices. These devices track a driver's hours on the road and can show whether the driver was violating hours-of-service rules. The supporting data is subject to the retention limits above.
Dashcams and telematics. Many trucks have forward-facing or driver-facing cameras and GPS tracking. Some systems record over themselves on a loop unless footage is saved.
Surveillance video. Nearby businesses and traffic cameras may have captured the crash, but that footage is often recorded over within days or weeks.
The Truck Itself Can Disappear
After a crash, a truck may be repaired, returned to service, sold, or scrapped. Once that happens, the chance to inspect its brakes, tires, lights, and cargo securement can be lost. The trailer and cargo may also be separated and moved before anyone outside the company has a chance to look at them.
Drug and Alcohol Testing Windows
Federal rules require post-accident drug and alcohol testing of truck drivers in certain crashes, including those involving a death and some involving injuries or disabled vehicles. These tests must happen within short time windows after the crash. Whether testing was done, and done on time, can be important evidence on its own.
How a Preservation Letter Helps
A preservation letter, sometimes called a spoliation letter, is a written demand telling the trucking company to keep all evidence related to the crash: logs, black box data, video, maintenance records, the truck itself, and more.
Once a company is on notice that a claim is coming, destroying relevant evidence can have serious consequences. Georgia courts can impose penalties for destroyed evidence, including instructing the jury that it may assume the missing evidence would have hurt the company.
In some cases, a lawyer may also arrange an inspection of the truck, hire experts to download its data properly, or ask a court for an order to protect the evidence.
What You Can Do to Protect Your Case
You can help preserve evidence too:
- Photograph the truck, including the company name, the USDOT number on the cab door, the trailer, and the license plates
- Get witness contact information at the scene, since trucking company investigators may speak with them too
- Keep your own vehicle until a lawyer can document it, rather than letting an insurer send it to auction right away
- Save your records, including the police report, medical records, and any letters from insurance companies
- Don't talk to the trucking company's representatives or give a recorded statement before speaking with a lawyer
- Call a lawyer quickly, so preservation letters go out before records are discarded or data is overwritten
Truck Traffic Across Metro Atlanta
Metro Atlanta is one of the busiest freight hubs in the Southeast. Interstates 75, 85, 20, and 285 carry heavy truck traffic every day, and warehouses and distribution centers keep trucks on local roads too, especially in places like Henry County along I-75. If your crash happened there, our McDonough personal injury lawyer page covers local details.
Trucking companies also frequently argue that the other driver was partly to blame. Our guide to Georgia's comparative fault rule explains why that matters, and our guide to the Georgia statute of limitations covers how long you have to file.
Act Before the Evidence Is Gone
The sooner a lawyer gets involved after a truck crash, the more evidence can be saved. The Adebayo Law Firm moves quickly to send preservation demands, investigate the crash, and hold every responsible party accountable. Learn more about how we handle truck accident cases.
Your consultation is free, and there's no obligation. Contact us or call (678) 250-9150 to talk about your case.
Frequently Asked Questions
How long do trucking companies have to keep driver logs?
Federal rules generally require motor carriers to keep hours-of-service records and supporting documents for six months. After that, they may be lawfully discarded unless the company has been put on notice to preserve them.
What happens if a trucking company destroys evidence after a crash?
If a company destroys evidence after it knew or should have known a claim was coming, Georgia courts can impose penalties. These can include telling the jury to assume the missing evidence would have hurt the company.
What is a truck's black box?
It's usually the engine control module, an onboard computer that can record data like speed, braking, and throttle use in the moments around a crash. That data can be overwritten if the truck is driven again.
Should I keep my car after a truck accident?
If possible, yes, at least until a lawyer has a chance to document it. Your vehicle's damage can help show how the crash happened. Talk to your lawyer before letting an insurer take it to auction.
How soon should I call a lawyer after a truck accident?
As soon as you can. Preservation letters are most effective when they're sent before records are discarded or data is overwritten, often within days of the crash.
Need help with a Truck Accident case?
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