Today's busy roadways need signal lights to keep traffic flowing and prevent accidents. Here's what the traffic light symbols ...

Updated: Nov 13, 2022 / 10:05 AM CST (WHTM) — We see traffic lights all the time. Sometimes we sail past green lights, and sometimes we hit every red light on our commute to work.

Called semaphore traffic lights, they had retractable arms — similar to railroad crossing arms — with the words “stop” and “go” on them. They would also have only red and green lights.

Even the traffic lights themselves have improved. They now measure either eight or 12 inches in diameter and must be visible in every lighting condition. The older incandescent bulbs that ...

Researchers are exploring ways to use features in modern cars, such as GPS, to make traffic safer and more efficient. Eventually, the upgrades could do away entirely with the red, yellow and green ...

Smarter vehicles could mean some of the most dramatic changes for the traditional traffic signal since the yellow light was added more than a century ago By JEFF McMURRAY The Associated Press ...

None of us really give much thought to traffic lights. We stop, we go, we occasionally mutter at the amber, and we get on ...

Vancouver's blinking green traffic lights are a great example: other places in Canada sometimes have the same blinking lights, but in Vancouver they mean something different to everywhere else. A ...

William Potts, who was a police officer in Detroit, is credited with designing the first three- and four-way colored traffic lights. The amber light was introduced during this time.

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.