GPS data can be used to prove speed in Georgia accidents when it is properly authenticated and shown to be reliable. Data from navigation systems, phone apps, and vehicle telematics can establish how fast a vehicle was traveling.
GPS-based systems calculate speed by tracking a device’s position over time, and that information can be relevant to how a crash occurred. Sources include built-in navigation systems, smartphone applications, fleet-tracking systems in commercial vehicles, and usage-based insurance devices. Each can generate a record of location and speed around the time of a collision.
To use that data in court, a party must authenticate it under O.C.G.A. § 24-9-901, meaning there must be evidence sufficient to show the record is what it claims to be. This often involves testimony from someone familiar with the system or records from the company that maintains the data. How the figure was calculated can also require explanation, and a witness familiar with the technology may be needed to describe the sampling interval, the source of the reading, and its accuracy.
Practical limits apply. GPS speed readings can carry a margin of error, may sample at intervals that miss a brief change in speed, and depend on signal quality. For that reason, GPS evidence is often presented alongside other proof, such as physical evidence or skid-mark analysis, rather than standing entirely on its own. Phone-based GPS evidence also requires showing that the device was in the vehicle and tied to the relevant driver, since the data reflects the phone’s movement rather than the car’s by itself. When the data is sound and properly explained, it can be persuasive evidence of vehicle speed.