Translation: this photo was taken on the factory test track (Alstom) on the occasion of the presentation of the new tram for Valenciennes.

This is a unique document; thanks to the author to share this with the site.

Разве это тестовые пути ? Усть-Катав, да, там настоящее тестирование.

Yes it's rails only for testing all railways vehicle

The third rail (for metro) is also visible on the photo.
The exact location of this track (and factory) can be seen on the map above.

Thanks for precision!