What Happens to Vehicle Data After a Crash

The Silicon Review
25 August, 2026
Author: Guest

Any company that puts people on the road now operates a rolling data estate. Telematics units, dashcams, engine controllers and phone apps all log the same trip from different angles. Most executives never think about that record until an incident forces them to.

Alt text: A fleet manager reviewing a telematics dashboard on a laptop

The request usually arrives from outside. When someone is hurt, a personal injury firm such as Agemian Law Group in Los Angeles will ask for the vehicle records tied to that trip. The request then lands on an IT or operations desk. This article is a general technical overview for business readers, not legal advice.

Why Vehicle Data Became the Primary Record

Because memory is weak and sensors are not. A modern commercial vehicle emits speed, braking, throttle and location data continuously. Video adds a second, harder to dispute layer.

Insurers moved first, and litigation followed close behind. Investigators can now reconstruct a timeline in hours rather than weeks. Automation raises the stakes again, and the spread of driverless services such as the robotaxi rollout across Los Angeles has normalized the idea that a vehicle keeps a detailed log.

Three record types matter most in practice:

Event data from the vehicle's own crash recorder.
Continuous telematics from the fleet platform.
Video from forward-facing or driver-facing cameras.

What Does an Event Data Recorder Capture?

A narrow slice, precisely timed. An event data recorder is a module inside the vehicle that stores a short burst of readings around a crash trigger.

Federal rules in 49 CFR Part 563 set the floor. Where a light vehicle has such a recorder, the regulation specifies a minimum list of 15 data elements. Those cover items like speed, engine throttle, braking, seat belt status and airbag deployment. The pre-crash window is measured in seconds rather than minutes.

That narrowness cuts both ways. The file is small and hard to argue with, but it says nothing about the previous hour of driving. Fleet platforms fill that gap.

Where Does the Telematics Stack Add Context?

Across the whole shift, not just the impact. Telematics is the pairing of onboard sensors with a communications link that ships readings to a server.

Alt text: Delivery vans parked in a depot at dusk

A typical stack holds four streams:

GPS position and speed at short intervals.
Harsh braking, acceleration and cornering events.
Engine diagnostics and maintenance faults.
Hours-of-service logs from electronic logging devices.

Federal hours-of-service rules already require electronic logging devices for most interstate commercial drivers. Many operators layer routing and dispatch data on top of that, which produces a second timeline of assignments and stops. Reconciling the two is often where a review begins.

Who Owns the Data After an Incident?

Ownership is rarely the interesting question. Access, retention and control are. Data may sit with the vehicle manufacturer, the telematics vendor, the insurer and the employer at the same time.

A federal review found the picture messy. The Government Accountability Office examined connected vehicle data privacy across 13 selected automakers and reported that every written privacy notice was accessible but none was written clearly. All 13 said they obtained explicit consumer consent, yet offered few options beyond opting out of connected services entirely.

For a business, the practical takeaway is contractual. Read the vendor agreement before an incident, not after one.

How Should IT Handle a Preservation Request?

Treat it like any other hold, and move quickly. A litigation hold is a formal instruction to suspend routine deletion of relevant records.

Short retention windows are the usual failure point. Dashcam footage often overwrites within days, and some telematics tiers keep granular data for a limited period before summarizing it. A request that arrives in week three can find the underlying file already gone.

Four steps reduce that risk:

Identify every system that touched the trip, including third-party apps.
Suspend automated deletion on those systems immediately.
Export native files with metadata rather than screenshots.
Log who accessed what, and when, from the first day.

Privacy Rules Apply Either Way

Driver-facing cameras and location histories are personal data in most jurisdictions. California is the sharpest example for any company with staff in the state.

The California Privacy Protection Agency finalized a package of rules covering cybersecurity audits and risk assessments in September 2025, alongside updates on automated decision-making technology. Businesses that monitor workers should read those obligations next to their fleet policy. The same tension shows up in offices, where camera monitoring compliance already sets expectations for notice and access.

Employees are usually more accepting when the policy is written down. Vague monitoring is what generates complaints.

A Readiness Checklist for Operations Teams

Most of this work is cheap before an incident and expensive after one. Build the answer once and keep it current.

Confirm five things this quarter:

Which systems record the fleet, and who administers each.
The retention period for every stream, in writing.
A named owner for preservation requests, plus a backup.
Export formats and how long an export actually takes.
What drivers have been told about monitoring.

Where the Technical Record Stops

Data settles facts about speed, position and timing. It does not settle responsibility, and it never replaces professional advice. Anyone personally involved in a collision should speak with a licensed attorney in their state, and companies should route these questions through their own counsel. The job for a technology team is narrower and clearer: know what exists, keep it intact, and hand it over cleanly.

Frequently Asked Questions About Vehicle Data

How Long Is Dashcam Footage Usually Kept?

Often only days, depending on card size and settings. Cloud tiers extend that, but retention still varies by plan. Confirm the exact figure with your vendor rather than assuming.

Is Telematics Data Considered Personal Information?

Frequently yes, because location and driving behavior link back to a person. California rules treat much of it that way. Policy and notice should reflect that from the start.

Can a Business Access Its Own Event Data Recorder Files?

Sometimes, though retrieval usually needs specialist hardware and the vehicle owner's permission. Many operators use a qualified third party. Plan the process before you need it.