Hi,

This road has a traffic sign C12 not a oneway C3 sign.
Legally there's a difference, when a road is signed with C12 people are allowed to turn and drive back (when possible).
In this case the northenmost house has a driveway, they are legally allowed to drive 'against the flow'.

With a C03 this is not allowed unless there's an undersign that excepts certain traffic types, like bicycle / mofa / mopeds.

-E de Wit