Early traffic lights had only red and green, which unsurprisingly made intersections rather chaotic. Who invented the yellow ...

Learn what the black lines on some traffic lights mean, how Dallas Display louvers work, and why traffic engineers use them.

New research shows that AI in cars might warrant a new, four-light traffic signal that is more efficient. Getty Images/iStockphoto See more of our coverage in your search results. Add The New York ...

While the universal traffic light design that the entire planet currently uses (still) does its job very well, there are experts who believe that this critical component of today’s traffic should be ...

The rest in red system uses sensors to detect drivers complying with the speed limit and gives them an earlier green light.

Instead of mailing speeders tickets, these smart traffic lights simply make speeders wait while safer drivers get the green ...

All around the country, traffic lights help maintain order on roadways by signaling when it’s time to stop (red), slow down (yellow), or continue (green). While the color scheme appears obvious now, ...

Lockdowns around the world have seen streets temporarily empty of cars, offering a glimpse of what our cities could be like without traffic jams. Now, scientists and engineers want to use artificial ...

Judging by a famous piece of footage showing a trip down Market Street in San Francisco circa 1906, traffic was a dangerous free-for-all in those days. Horses, cars and pedestrians, all getting in ...

The Newnan City Council approved a more than half a million dollar contract to install new traffic lights at a busy intersection.