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.

Massachusetts drivers are facing a new kind of red light — and many aren’t sure what to do. Across the state, 40 hybrid traffic lights — or pedestrian hybrid beacons — have been installed with more on ...

Modern traffic light technology isn't just a simple sequence of red, yellow, and green. It's a complex detection system designed to manage traffic flow based on real-time demand. The very first "smart ...