Telematics Data and Accident Reconstruction Basics

Key Takeaways

• Telematics data shows selected vehicle metrics at recorded intervals — it is one input into reconstruction, not a complete record of what happened.
• Preserve telematics data early. Many platforms overwrite records on a rolling schedule, and the preservation window may close before the investigation formally requests it.
• Outside data requests — from insurers, attorneys, or investigators — should go through the company safety or legal contact before any access is granted.

What telematics systems typically record

Fleet telematics systems collect data through GPS receivers, engine control modules, sensors, and connected cameras. Common data points include vehicle location at timed intervals, speed, heading, engine RPM, hard event triggers, fuel use, and in some platforms, diagnostic fault codes or driver behavior summaries.

The data available depends on the platform, installed hardware, and the subscription the carrier is running. Not all systems capture the same data, and they don't all capture it at the same frequency.

A system logging position every 30 seconds has a very different resolution than one logging every 5 seconds — a difference that matters when investigators try to reconstruct vehicle path and speed in the seconds before an impact.

How telematics data is used in reconstruction

In a serious truck crash, reconstruction analysis typically works to establish vehicle speeds, positions, heading changes, and braking behavior in the period before and during the collision. Telematics data can support this analysis where the logging frequency is sufficient and the data quality is reliable.

Reconstruction specialists also consider what telematics data does not capture: driver alertness and attention, steering inputs not recorded by sensors, conditions inside the cab or on the road outside the camera frame, and events between logging intervals. Data that is absent is not the same as data that confirms or contradicts a particular sequence of events.

Preserving data after an incident

After a serious incident, notify the fleet manager or safety contact promptly so telematics data can be flagged for preservation before it falls outside the platform's retention window. Many systems allow a specific trip or time range to be locked or exported — but that action usually requires someone to initiate it.

Keep the raw export, not just a summary report or a screenshot of the map view. Raw data files retain metadata that may be significant if the data is reviewed by a specialist. A dashboard PDF showing a trip summary does not replace the underlying log.

Handling requests from outside the company

Insurers, attorneys, law enforcement, and reconstruction consultants may request telematics data as part of a claim or investigation. Route all such requests through the company's legal or safety contact. Do not grant direct platform access to third parties without authorization from the responsible company contact.

When data is shared, document who received it, in what format, on what date, and under what request. Keep a copy of everything that was shared. If a legal hold has been issued or is anticipated, raise it immediately rather than handling the data request through normal operational channels.