It will be the first system in the Netherlands where light rail vehicles will partly use heavy rail tracks, sharing these tracks with heavy rail trains, like the systems around Karlsruhe and Saarbrücken, Germany,
For Leiden it will probably be on new track through the center at street level (alternatives that have been proposed were around the center on existing track, or in a tunnel through the center).
To start with they are used in the regular railway service between Gouda and Alphen aan den Rijn. The stations have been adapted: platforms have two levels, the low one for the new vehicles.
A disadvantage of the new vehicles, compared with trains, is that they have no toilet.