(WHTM/NEXSTAR) – On many traffic signals found throughout the United States, there is a small light that is placed in between or off to the side of the traffic signal lights. Sometimes you see them ...

Across the United States, drivers are looking up at intersections and noticing a new, unfamiliar glow: small blue lights perched near traditional red, yellow and green signals. They are not decorative ...

Traffic light on yellow with sky and trees in background. - Ktsimage/Getty Images Ah, the yellow light. You know, that signal that is supposed to let you know to slow down as you approach the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (WHTM/NEXSTAR) – On many traffic signals ...

If you've ever wondered how traffic lights work and how they can detect your car, you've probably also been curious about those small blue lights mounted above the signals themselves. These blue ...