Bus puzzle
Black dots on the bus window: That is your secret function!
The points on the bus window fulfill a specific function
Why are the windows on the bus so often covered with small black dots that block your view? See here why they are so important!
Most of the time we don't even notice them when we take a seat on the bus. But once you've noticed them, you'll quickly discover them again and again: the small black dots on the edge of bus window panes. At first glance they look like a designer idea – but in reality they fulfill a very specific function. In the video you can see what the points are really about!
Sources used:Stern.de, archive