At the Vacantievreugd resorts (Samoza, Besthmenerberg, Flevo Natuur and De Meeuw) at the sanitary buildings and swimming pools the number of people inside are counted. When the maximum is reached, the traffic light will turn red. Until someone comes out again. So no complicated counting mechanisms or counting by hand, but everything completely automatic. That makes it a lot safer for the guests as you can see from afar whether there is room.