This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. We see traffic lights all the time.

Red universally symbolizes danger, making it the obvious choice for the "stop" signal. Psychologically, this bold color ...

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 ...

Traffic Lights: If you stop at a traffic signal, you will always see the same three colours — red, yellow and green. While modern technology has transformed vehicles and roads, traffic lights across ...

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As cars and trucks get smarter and more connected, the humble lights that have controlled the flow of traffic for more than a century could also be on the cusp of a major transformation. Researchers ...

(WHTM) — We see traffic lights all the time. Sometimes we get green lights, and sometimes we hit all the red lights on our commute to work. But, while sitting at a red light, have you ever wondered ...

This undated photo provided by the University of Michigan College of Engineering shows vehicles as they drive through the Old Woodward Avenue and East Maple signalized intersection, which was retimed ...

The first traffic light came into existence in the United States in the early 1900s. Called semaphore traffic lights, they had retractable arms — similar to railroad crossing arms — with the words ...

Researchers are exploring ways to use features in modern cars, such as GPS, to make traffic safer and more efficient. As cars and trucks get smarter and more connected, the humble lights that have ...