It's where the shuttle chartered by the ULB stops and drops off people in the morning as well as picking them up in the evening. It's not part of an official public transportation service. I don't really know why I put it there, it could be removed.

It is possible, but I only moved the points "parking entrance" and "parking exit" to the ends of the extended highway=services lanes without modifying the tags and without checking if they were correctly used.

Hello, you are right, this is a mistake.
Bikes are allowed in both directions but the cycleway is only in the direction of car circulation (St. Servais). Is there a tag for indicating such a situation ?