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 ...

Your average driver might like to bemoan them, but traffic lights play an integral part in not only controlling traffic patterns in urban and suburban areas, but also helping to keep drivers and ...

Those blue lights above traffic signals aren’t decorative. Here’s what they’re for and why more cities are installing them. Blue confirmation lights help police spot and enforce red-light violations ...