Confused about what to do at a red light? Here's when it's legal to turn, what flashing signals mean, and who can go through ...

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.

LYNWOOD, Ill. (WLS) -- Is three seconds long enough for a yellow traffic light? It's the bare minimum for a yellow light in Illinois, and paired with a red light camera, it can be expensive. One red ...