Traffic Light Information predicts time-to-green for fixed and variable-duration lights. It's the first application of V2I, Audi says. Share on Facebook (opens in a new window) Share on X (opens in a ...

DENVER (KDVR) — Driving in Denver, you’re bound to be stopped by one of more than 1,000 traffic lights in the city. While traffic lights maintain a safe traffic flow, they can also be a headache for ...

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.