The warning for poor visibility applies until 10 a.m. this morning. Until that time, motorists are in particular to pay attention to.
The KNMI warns that it can just happen that the road is suddenly no longer visible, and that flights and public transport can be delayed. There is also a chance of accidents because people can no longer see their predecessors on the road well.
Motorists who end up in such an area with fog can best encourage their fog lights with less than 200 meters. Is the view less than 50 meters? Then it is wise to also feed the fog lights at the back.