Have you ever been driving at night when you see a car coming towards you with only one headlight on? Is it a car? Or is it a motorbike, or even a truck? It can be pretty hard to tell until you get quite close … and it’s a pretty uneasy feeling you get – especially when it’s the left light that is working … because from a distance you’re not quite sure if it’s on your side of the road or on the other side.