A) Are there enough signs here?
B) The literal translations of ‘Voetgangers en Fietsers Afstappen!’ is ‘Pedestrians and Cyclists Dismount!’
What are the pedestrians riding?
So, thinking about this some more… How could we improve the situation? I think the most important thing is to point the cyclists and pedestrians around the work site. The solution offers itself: Split the message! No, I don’t mean hang more signs. Just put the arrow in the middle, so you get:
Pedestrians and Cyclists
That way, the arrow will be highlighted more, and the ‘Afstappen’ on its own is only aimed at people riding something. Oh wait – the ‘Afstappen’ message seems to be invisible to cyclists anyway. Never mind…