# Data Dictionary - European Road Freight - total, national & international tonne-km, cleaned Parquet

**Units:** vary by `series` - read the per-row `unit` column (overall: million tonne-km).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Geo / country code (DE, FR, PL, …) |
| `ts` | timestamp (UTC) | Year |
| `series` | str | Road freight: total / national / international |
| `value` | float | Million tonne-kilometres |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (annual) |

*Source: Eurostat (European Commission).*