Most of the time we don't even notice them when we take a seat on the bus. But once you have noticed them, you will 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 all about!
Black dots on the bus window: this is their secret function – video
