Simple enough. But what happens when you live in a culture where green also means blue? (Before we answer that, here's why our own traffic light colors are red, yellow, and green.) That’s when ...

Red means “stop,” but what about blue? Drivers are noticing more than one stop sign color. Here’s where you might mind ...

“There are several different ways an officer will do traffic monitoring, and hiding is absolutely one of them,” he said. If I do not feel safe pulling over as the blue lights come on, what ...