Quick Answer
Dash cam footage protects you after a truck accident by showing what actually happened. Save the clip before the camera overwrites it, keep the untouched original, and give copies to your insurer. If the crash is one of FMCSA's 21 eligible types, upload the police report and video through DataQs. A Not Preventable finding removes the crash from your Crash Indicator BASIC calculation.
Key Takeaways
- Most dash cams record on a loop, so footage that wasn't saved as an event can be overwritten. Pull the clip the same day.
- FMCSA's Crash Preventability Determination Program (CPDP) reviews 21 crash types. For crashes on or after December 1, 2024, one type covers any crash where video shows the sequence of events.
- Every CPDP request needs a police accident report, and FMCSA won't review crashes more than 5 years old.
- Not Preventable crashes stay listed on the public SMS website in a separate table but don't count in the Crash Indicator BASIC.
- Carriers must keep an accident register for 3 years under 49 CFR 390.15.
- Deleting footage after a crash that could lead to a claim can be treated as destroying evidence, and the same video can show driver fault.
“After a truck crash, save the dash cam clip before it overwrites, keep the untouched original, and give copies to your insurer. If the crash fits FMCSA's Crash Preventability Determination Program, upload the police report and video through DataQs. A Not Preventable finding takes the crash out of your Crash Indicator BASIC calculation.”
How does dash cam footage protect a truck driver after an accident?
Video settles the "he said, she said" argument. A car that cuts in and brakes, or a driver who runs a red light, is hard to dispute on camera. Our piece on whether AI dash cams are worth it covers cost; this guide covers what to do once a crash happens.
The same clip can do three jobs, each with its own rules.
Where the footage goes | What it can do | What it can't do |
|---|---|---|
Your insurer | Support your account and help defend a claim | Decide fault on its own |
A lawsuit | Serve as evidence once requested in discovery | Stay private if it's relevant |
FMCSA's CPDP via DataQs | Get an eligible crash marked Not Preventable | Assign legal fault or be used in a damages case |
That last point matters. Under 49 U.S.C. 504(f), FMCSA's preventability determinations can't be admitted into evidence or used in a civil action for damages, as FMCSA explains in its December 2024 CPDP notice. A Not Preventable finding helps your safety record, not your lawsuit.
What should you do with dash cam footage after a truck accident?
Safety comes first: check on people, call 911, and follow police instructions. Then handle the footage in this order.
In the first hour
- Note the exact time and location so you can find the right clip.
- Save the clip with your camera's event or SOS button if it has one. On Lucid ELD's AI dash cam, the SOS button alerts dispatch with live location and video.
- Don't delete, trim or re-record anything on the device.
- Tell your carrier or safety manager the crash was recorded.
- Don't post video or photos online. A public post can be taken out of context and used against you.
In the first day
- Download the full clip, starting well before the crash and running past it. Lucid's camera lets the office pull recorded clips from any truck without waiting for it to return.
- Keep the original file as downloaded, with its timestamp and any GPS or speed data. Work only from copies.
- Start a chain-of-custody log: who downloaded the file, when, from which truck, and where each copy went.
- Save that day's ELD log. Carriers must keep duty status records for at least 6 months under 49 CFR 395.8(k); after a crash, keep them longer.
- Report the crash to your insurer and ask how they want the video.
In the first week
- Request the full police accident report. You need it for the CPDP.
- Add the crash to your accident register if it meets FMCSA's definition.
- Store the original in two places, such as your provider's cloud library plus an offline drive.
- Ask your insurer or attorney how long to keep the footage.
How does FMCSA's Crash Preventability Determination Program use dash cam video?
The CPDP lets carriers and drivers ask FMCSA whether an eligible crash was preventable. After a 2017 to 2019 demonstration, FMCSA started the ongoing program with a May 6, 2020 Federal Register notice (85 FR 27017) covering 16 crash types for crashes on or after August 1, 2019.
The December 4, 2024 notice expanded the list to 21 types for crashes on or after December 1, 2024; older crashes use the 2020 criteria. New types include side-swipes by a vehicle going the same direction, vehicles entering from a driveway or parking lot, another driver losing control, crashes with non-motorists, and "any other type of crash" where "a video demonstrates the sequence of events."
That video type is where dash cam footage matters most. FMCSA expects the video to cover the full crash sequence, not hours or days before it.
Not Preventable crashes remain on the public SMS website in a separate table, are left out of the Crash Indicator BASIC, and are noted on the driver's PSP record. Preventable and Undecided crashes keep counting. For how that fits your scores, see CSA scores explained.
The burden is on you to show "compelling evidence." As of October 2026, FMCSA's CPDP page says requests take an average of 90 days because of high volume.
How do you submit dash cam footage in a DataQs crash review?
Requests go through DataQs as a Request for Data Review (RDR). The general process is in our guide to challenging a violation in DataQs. For a crash, add these steps.
- Confirm the crash is under 5 years old and fits an eligible type for its date.
- Get the complete police accident report. FMCSA requires one for every request.
- Export a copy showing the full crash sequence. FMCSA's 2024 notice says DataQs uploads were raised to 25 MB in September 2023, so you may need a trimmed copy. Keep the original.
- For a fatal crash, include DOT post-accident drug and alcohol test results, or the required record of why testing wasn't done in time.
- Write a short, factual summary: crash type, what the video shows, and the timestamp where it shows it.
- Answer any FMCSA request for more documents within 14 calendar days, or you risk an Undecided result.
After a Preventable or Undecided result, you can reopen the RDR once or file a new one with new evidence.
What crash records does FMCSA require carriers to keep?
The video is voluntary. Several crash records are not.
Under 49 CFR 390.5, an accident is a CMV crash with a fatality, an injury treated away from the scene, or a vehicle towed for disabling damage. Section 390.15 requires a 3-year accident register listing the date, city and state, driver, injuries, fatalities, and any hazmat release, plus copies of accident reports required by states or insurers. Carriers must also make "all records and information pertaining to an accident" available to investigators. Expect that to include footage.
Post-accident testing under 49 CFR 382.303 runs on a tight clock:
Crash result | Driver cited? | Test required |
|---|---|---|
Fatality | Yes or no | Alcohol and drugs |
Injury treated away from scene | Yes | Alcohol and drugs |
Vehicle towed for disabling damage | Yes | Alcohol and drugs |
Injury or tow-away | No | None |
The citation window is 8 hours for alcohol and 32 hours for drugs. If alcohol testing isn't done within 2 hours, the employer records why and stops trying at 8 hours; drug testing stops at 32. Part 382 defines "employer" to include a self-employed individual, so an owner-operator with their own authority handles this.
Can deleting dash cam footage get you in legal trouble?
Yes. Once a crash could lead to a claim, you're expected to keep relevant evidence. Destroying it is called spoliation.
In federal court, Rule 37(e) of the Federal Rules of Civil Procedure covers lost electronic information. If you failed to take reasonable steps to preserve it, the court can order measures to cure the harm. If you meant to keep it from the other side, the court can presume it was unfavorable to you, tell the jury so, or dismiss the case or enter a default judgment. State courts have their own rules.
Turn off auto-delete for that clip, tell your provider not to purge it, and forward any preservation letter to your insurer the same day.
Can dash cam footage show the driver was at fault?
Yes. A road-facing camera records your speed and following distance as clearly as the other car, and a driver-facing lens records phone use.
If the clip shows you were too fast for conditions or following too close, it helps the other side. FMCSA also marks a crash Preventable if the driver was prohibited from driving, such as under an out-of-service order or a Clearinghouse prohibition.
Still, never delete it; a missing clip usually looks worse than a bad one. Skip a CPDP request the video doesn't support, and let your insurer and attorney handle the claim. For fleets, that footage is also coaching material, and Lucid's AI dash cam flags speeding, tailgating, lane departure, harsh braking and distraction with in-cab alerts. For setup, see ELD with dash cam; current plans are on the pricing page.
Want video evidence and in-cab safety alerts? See Lucid's AI dash cams
Educational content, not legal advice. Confirm requirements against current FMCSA regulations and your state's rules.
FAQ
Can I submit dash cam video to FMCSA for a crash review?
Yes. You can attach video, photos and other documents to a CPDP request in DataQs, along with the required police report. For crashes on or after December 1, 2024, video showing the crash sequence can make a crash eligible even outside the other 20 types.
Does a Not Preventable crash come off my SMS record?
No. It stays listed on the public SMS website in a separate table, but it's removed from the Crash Indicator BASIC calculation.
How long should I keep dash cam footage after a truck accident?
No FMCSA rule sets a retention period for dash cam video. Keep it until any claim is closed and as long as your insurer or attorney advises.
How long does an FMCSA crash preventability review take?
As of October 2026, FMCSA says an average of 90 days. Answer document requests within 14 calendar days to avoid an Undecided result.
Should I give my footage to the other driver's insurer?
Give it to your own insurer first and let them handle outside requests. If a lawsuit follows, relevant footage can be requested in discovery.