Traffic lights today are controlled by computers and other purpose-built systems, but what did people do before computers ...

At first glance, traffic lights are stunningly simple: green means go, red means stop, and yellow means it’s about to turn red. But like cars, phones, and just about everything else on this planet, ...

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 ...

Massachusetts is installing hybrid pedestrian traffic lights, but a UMass study shows many drivers don’t understand how to use them.

Sensors in the ground communicate with the traffic signals to constantly retime the signals based on road conditions. If more cars are coming in one direction, the direction with heavier traffic flow ...

Some things are so ubiquitous that it's easy to forget they're designed for a reason. With more than 300,000 traffic lights set up across the United States, it's easy to take how they look for granted ...