All the area on Drève des Rêves/Dromendreef and Gare Maritime is already car-free.

There are a few roads with access to vehicles, along Gare Maritime, and this one (https://www.openstreetmap.org/way/117951236) which is used by shuttle buses and which will always be unrestrictedly open to motor vehicles because it is the access to/from the underground car park.

I guess they might close a few more alleys in the future.  I believe we have enough elements here to close this note.