The TGD file is a specific data format generated during the download of a digital tachograph driver card. While the universal European standard is often referred to as DDD, the .TGD extension is widely used by specific download keys and government software to encapsulate a driver's personalized activity records.
In the context of EU Regulation 561/2006, the TGD file serves as the primary legal evidence for a driver's working day. It contains digitally signed metadata that guarantees the authenticity of driving times and rest periods, making it a critical asset during labor audits.
Technical Composition of a .TGD File
Unlike vehicle unit files, the TGD file is exclusively focused on the individual professional. It follows the driver regardless of which truck or fleet they operate. Key data blocks include:
Driver Identity & Shifts
Full legal name, card number, and expiration date. It tracks daily driving hours across multiple vehicles used within the last 28 to 56 days.
Rest & Duty Cycles
Records of insufficient daily rest, mandatory breaks, and "other work" (hammer icon) manual entries.
TGD vs. DDD: Understanding the Difference
One of the most common questions in fleet management is the distinction between these two formats. While they are technically compatible, their scope differs:
| Feature | TGD File (Driver Card) | DDD File (Vehicle/VU) |
|---|---|---|
| Primary Focus | The Individual Driver | The Vehicle Unit |
| Download Cycle | Every 28 Days | Every 90 Days |
| Key Data | Personal driving & rest | Speed, faults, and technical events |
Legal Custody and Privacy (GDPR)
Because TGD files contain sensitive personal information, their management is strictly governed by the General Data Protection Regulation (GDPR). Companies must ensure:
- Secure Archiving: Files must be stored on encrypted servers for at least 1 year.
- Immediate Availability: Files must be ready for inspection by transport authorities at any moment.
- Integrity: The digital signature must remain intact. If a TGD file is modified, its legal validity is voided.
Advanced Analysis with TachoTools
A raw .TGD file is a binary blob that cannot be opened by Excel or PDF viewers. To extract value from this data, you need a specialized Tachograph File Parser.
By uploading your files to the TachoTools Secure Portal, the technical metadata is transformed into:
- Visual Compliance Dashboards for traffic managers.
- Automatic detection of accumulated driving excesses.
- Precise allowance and per diem reports based on real activity.
Verify Your TGD Files Integrity
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Technical Documentation