Occasionally, during events or construction, you may see temporary stop lights set up by workers. How do these portable traffic signals work?

Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

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 ...

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 ...

NORWALK — The city is beginning phase five of a grant-funded project aimed at modernizing the city’s traffic signals, which involves the addition of two new signals and the conversion of 19 existing ...

Across the United States, drivers are looking up at intersections and noticing a new, unfamiliar glow: small blue lights perched near traditional red, yellow and green signals. They are not decorative ...

HONOLULU (KHON2) — Traffic along the Leeward Coast is notoriously bad and those who regularly drive along Farrington Highway know the traffic lights can sometimes add to the backlog. But city and ...

EL PASO COUNTY, Colo. (KRDO) -- It's a question viewers have often asked during the nine months of KRDO 13's The Road Warrior coverage: Why haven't new traffic signals at a busy intersection been ...