A surprising amount of technology might be making that red light hold you up. Here's how traffic lights detect (or don't ...

Figuring out the placement of traffic lights with cameras isn't always a straightforward process.

You may have heard the term "Green Wave" in relation to traffic signals. Here's what it means, why cities do it, and what it ...

If you are in your car, driving through an intersection with traffic lights, you're accustomed to looking for a few types of signals — usually green, yellow, and red lights or turn arrows. These ...