Thank you for asking, the building phase came to an end earlier this week, when the final building was handed over. (the City of Antwerp Police headquarters, at Borsbeeksebrug 38).  

About this particular note : the ramp leads down, to the below ground bicycle parking; there is no connection to the road, only to the cycle path. 

Have taken couple dozen pics this evening, upload soon : also included block plan showing each block's street address as Borsbeeksebrug - which makes sense, as the entrance to the parking level is from the Borsbeeksebrug via the road along the R1 ring. 

Still to find (access to) the upper level walkways where several bicycles can be seen parked. 

No references to Post X n on the buildings : those were planning / construction phase indicators. 