Traffic engineers are quietly working on a radical idea: adding a white signal to the familiar red, yellow, and green. Instead of signaling drivers directly, the extra light would tell humans when to ...

Red, yellow and green have become the universal symbols for stop, slow and go – but what does white mean? Researchers from North Carolina State University proposed adding a new color, white, to ...

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 ...