If you’ve driven through certain intersections lately and spotted a small blue light mounted above or below the usual red-yellow-green stack, you’re not imagining things. Those blue dots aren’t ...

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

(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 ...