Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

You may have noticed some traffic lights with a white light that works independently of the others. They're not for normal ...

Some things are so ubiquitous that it's easy to forget they're designed for a reason. With more than 300,000 traffic lights set up across the United States, it's easy to take how they look for granted ...

It seems to be a universal experience for drivers that the more anxious you are to get to your destination (or the later you're running), the more likely those lights are to be red. Typically, they'll ...