Caropen's figures are computed from open government data. We do not edit them by hand – we only normalise make and model names and drop duplicates and obvious errors, as described in the methodology.
Sources
| Dataset | Publisher | What we use | Refreshed |
|---|---|---|---|
| Vehicle technical inspection data (data.gov.lt, dataset no. 2721) | State Data Agency (Valstybės duomenų agentūra); provider Transeksta | Every technical inspection since 2015: make, model, class, fuel, year of manufacture, odometer reading, verdict, emissions measurements, inspection week and municipality | Weekly |
| Registered vehicle fleet open data | Regitra (state enterprise) | Registered cars by make, model and municipality – for fleet shares and name normalisation | Quarterly; fleet figures are shown once integrated |
The inspection dataset is marked as under development on data.gov.lt, so its structure may change. Every load is checked: if the fields change or the figures become implausible, the refresh stops and the previous figures stay.
Refresh
- Every week (Monday morning) new inspections are loaded, all figures are recomputed and, once the checks pass, published.
- The bottom of every page says when the data was last updated.
- Rankings are an annual edition; earlier editions are not changed.
What is pseudonymised
The source contains no personal data, and vehicle identifiers are replaced with pseudonyms:
- Plate number and VIN – hashed. We never reverse them and never show them.
- Vehicle pseudonym (
tp_id) – stable across years, so the inspections of one vehicle can be linked (annual mileage, odometer inconsistencies). Results are published for groups only. - Inspection station code – hashed. We do not identify or compare stations; only their number per municipality is shown.
- Rare makes and models are marked "CENZŪRUOTA" (censored) in the source so a car cannot be recognised; such rows count only in national and municipality figures.
Licence and attribution
The source data is published under the Creative Commons Attribution 4.0 (CC BY 4.0) licence. You may use Caropen's figures, charts and downloads under the same licence – commercially too – as long as you give attribution. The attribution text shown at the bottom of every page:
- Source: State Data Agency / Transeksta, Vehicle technical inspection data, data.gov.lt, CC BY 4.0; Regitra open data.
When you use Caropen's figures, also credit Caropen.lt with a link to the page. More on how to cite in the methodology.
Downloads
- Odometer-inconsistency study tables (CSV) – the share of odometer inconsistencies nationally, by year and by make; the study: odometer inconsistencies.
- Reliability rankings – each age-band page's table can be downloaded as CSV.
- Open API – every figure on the site as JSON, e.g. national figures.