There is a detailled document "sainctelette_Note explicative du projet.pdf(PDF) (42.22 Mo) " that was attached to the permit (PU) but i don't know why server abord the download : https://mobilite-mobiliteit.brussels/fr/projets/place-sainctelette (note pictures on web page are absolutly not correct)

I have read the document several month ago : this street will be oneway north to south : https://www.mapillary.com/app/?pKey=852846163459534 allowing going to Lavallée turning right and Charbonnages turning left. I presume that this small section : https://www.mapillary.com/app/?pKey=831084969167874 will be not oneway but not sure 100 %

https://www.openstreetmap.org/way/238888036 will be removed but as i see they just begining the "ear" of the cycleway on west so it's not for now. 
