Autoen
2020 – today
Luxembourg publishes its vehicle registration statistics, but not in a form anyone can actually read. Autoen turns those releases into something you can browse: pick a brand, pick a model, and watch the fleet change.

What it does
Data snapshots, from December 2017 to the most recent monthly release, each split by brand, model, body style, fuel, country of origin and colour. Any two can be compared side by side, so the interesting part is never a single number but the shape of the curve between them.
Everything is pre-computed into static JSON, so the site loads fast and costs nothing to run.
Where the data comes from
The Société Nationale de Circulation Automobile publishes the registration figures as open data through data.public.lu.
Why I built it
The idea of this project started years ago after the SNCA made the registrations public via data.public.lu. Initially I just wanted to know how often my car's model was registered in Luxembourg so I imported the XML files into a local database and ran multiple SQL queries, just for fun.
Over the years, friends asked me similar questions and to avoid having to manually restart the project and manually run SQL queries I decided to publish the project online and make it available to everybody.