Simple enough. But what happens when you live in a culture where green also means blue? (Before we answer that, here's why ...

We know red lights are for fire trucks and blue are for law enforcement, but what on earth does it mean if you see green ...

Every regular child knows that Red means stop ... But why does Japan use blue traffic lights, instead of green? The answer is rooted in the history of the Japanese language.

The leader assigns a red light to the direction it is heading and gives a green light to the perpendicular traffic. After a set amount of time, a leader is selected from the green light traffic ...

The study points out that a large portion of traffic lights in ... illegal states (conflicting green or yellow lights), and take over with the familiar 4-way red flashing. Since a technician ...