Traffic lights help traffic flow by directing specific lanes to go and others to stop. Some are more complex and include signals for buses. But at the end of the day, they're devices with red, yellow, ...

Close up of a traffic light with a bus priority light in a city - GrandRiverTransit/YouTube If you are in your car, driving through an intersection with traffic lights, you're accustomed to looking ...

Ah, the yellow light. You know, that signal that is supposed to let you know to slow down as you approach the intersection, but makes you speed up instead? You probably take it for granted, but ...