Mizuna
On 220623 at 8.30 I discovered the schoolstreet : a nadar with C3 and a nadar with "rue scolaire - schoolstraat" placed in the beginning of rue du Mystère. 
https://imgur.com/a/9BG9Rex
At knot 5814458276 (Brusselse stwg) there was a C1: that part becomes one way for cars:
https://imgur.com/B7z8F8L
Finally I found this one:
http://forest.irisnet.be/fr/vie-politique/publications/presse/fichiers/220215-cp-rue-scolaire-rue-du-mystere.pdf 
Wich means hours of schoolstreet: 8h à 8h45, du lundi au vendredi
Morale de l'histoire: it is easier to surf than to take your bike.
I’ll leave the tagging to specialists…
