The first hour shapes the whole claim
What you document at the scene and in the days right after a crash often matters more than anything that happens later — because it's the only chance to capture some of it at all.
An accident file isn't one document. It's a collection: photos of the scene and damage, the police accident report, contact and insurance information for everyone involved, witness statements, your own written account, repair estimates, and any post-crash inspection or drug/alcohol testing records. Some of these you control directly. Others — like the official police report — you'll need to request afterward.
Separately, if you run your own authority, certain crashes also trigger federal recordkeeping and testing obligations under FMCSA rules, on top of whatever your insurer and state require.
Some information disappears within hours
Skid marks fade, witnesses move on, and memories blur — but claims and disputes can surface weeks or months later. An insurance adjuster, an opposing attorney, or an FMCSA reviewer may ask questions about a crash long after the scene has been cleared. If you didn't capture the details when they were available, there's often no way to get them back.
There's also a safety-record angle specific to trucking: a crash that appears on your record through FMCSA's Safety Measurement System can affect how carriers, brokers, and insurers see you, even if you weren't at fault. A well-documented file is what supports a request to have that crash reviewed and, if it qualifies, marked as not preventable.
What to capture, and why it matters
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Photograph broadly, then specifically: wide shots of the full scene and all vehicles' final positions, then close-ups of damage, license plates, road conditions, skid marks, traffic signs or signals, and any visible injuries. Photos and dash cam or video footage can matter for years, not just for the initial claim.
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Collect contact and insurance information for everyone involved — other drivers, vehicle owners if different, and any witnesses — plus the responding officer's name, badge number, agency, and the police report or case number. This information is often hardest to get after everyone has left the scene.
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The police accident report usually isn't available immediately. Most agencies take days to weeks to finalize it. Ask the responding officer how and where to request a copy once it's ready, since you'll likely need it for your insurer, FMCSA's DataQs system, or both.
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FMCSA defines a "recordable accident" narrowly: a fatality, a bodily injury where someone receives medical treatment away from the scene, or a vehicle towed from the scene due to disabling damage. Motor carriers must keep an accident register covering these crashes for 3 years, including copies of all reports filed with the state or insurer.
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Post-accident drug and alcohol testing has specific triggers: any fatality requires testing regardless of fault, and a citation combined with either an away-from-scene injury or a tow-away also requires it. Alcohol testing must happen within 2 hours (attempts stop after 8), and drug testing within 32 hours.
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Repair estimates and post-crash inspection records support your claim and your safety record — they document the vehicle's condition and help confirm whether a required post-accident inspection was completed.
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You can ask FMCSA to review whether a crash was preventable. Its Crash Preventability Determination Program covers 21 specific crash types and requires a police accident report plus supporting documentation, photos, or video, submitted through the DataQs system. Crashes found not preventable are removed from your Crash Indicator score, though they remain listed on the public record.