Reverted with https://www.openstreetmap.org/changeset/163285982.

I think you (or your driving instructor :-)) have a misunderstanding what "makes" a oneway road.
A "real" oneway road needs to have signs on both ends: sign 267 at the one, sign 220-20 at the other end (which is missing here). If only sign 267 exists, it is "only" prohibited to enter the road from that direction, but you are allowed to drive in both directions within the road - it does not matter if there are parking lots or driveways. It is even allowed to turn around without legal problems.

oneway:bus=no already exists on https://www.openstreetmap.org/way/31288034/.