However, as technology advances and the rise of autonomous vehicles (AVs) becomes more prominent, scientists are now proposing the addition of a fourth colour to traffic lights—a "white light ...

Red, amber, green – traffic lights are pretty much the same the world over, and have been for more than a century. However, they could one day have a fourth colour added to help traffic flow ...

Question: I’m wondering about a light that seems to only be on at night on the traffic lights. It’s a small purple or blueish light that’s near the traffic lights. I’ve tried to figure out ...

In traffic lights, the colour red is used to mean stop. Red can also have a link to anger. Cartoons or movies may show a character going red in the face when getting upset. It can also mean ...