I don't think that even narrow motor vehicles can ride it end to end, certainly not here: https://www.mapillary.com/app/?pKey=130545196411846&lat=50.897581199972&lng=4.3837381&z=17&panos=true&x=0.01826217356428078&y=0.8002293645923633&zoom=0&focus=photo

I guess that rising bollards are there to allow vehicle access only to some parts of it.

Bicycles are allowed so, in my view, highway=path is the right tag here

