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, ...

Google, for example, is rapidly expanding a one-year-old product, called Green Light, that will create “green waves”—that is, one green light after another—in 14 cities where the system is ...

Electric traffic lights are nothing new. They date back to 1914, when a bored police officer in Cleveland, Ohio, was tasked with switching on a red bulb for the cars (mostly Ford Model Ts) to stop and ...

Google claims that Project Green Light can reduce greenhouse gas emissions at traffic signals by up to 10%. It can also improve traffic flow by up to 30% in cities.

In British Columbia, all of these blinking green lights mean the same thing. However, drive across the country to Ontario, and the traffic signage can get confusing.

Traffic lights along a 32-mile stretch of U.S. 1 will stay green longer when buses approach thanks to special devices that ...