Thanks for the pictures.  I did some fixes here.

Before closing the note, I want to check if we have the same understanding of the situation:

1) Legally a living street coming from the south.  They did not seem to have created a coherent system because someone (e.g. a cyclist) arriving from the north (chaussée de Mons) will not meet a F12a sign upon entering, only the sign at the end.

2) Emergency trucks and ambulances can easily bypass the planter from the south, but I fear there is no access from the north (chaussée de Mons) because of the bollards.  So, I split it and set emergency=no on this part (https://www.openstreetmap.org/way/1257852394).  Considering (1) and (2), perhaps this small connector can be changed into a cycleway.