Early traffic lights had only red and green, which unsurprisingly made intersections rather chaotic. Who invented the yellow ...

Any driver should know that red traffic lights mean “stop” and green lights mean “go,” but whether yellow lights mean “slow down” or “go faster” may be up for debate. Yellow lights, the temporary ...

Pity the poor yellow traffic light, an unappreciated, often unheeded tier of traditional traffic signal arrays. Glowing steady, the driver license manual says it means you must stop if you can stop ...