The classic traffic signal design was internationally recognized in 1931. The ubiquity of stop lights’ Red-Yellow-Green phases aren’t just coincidence—they’re actually codified in an international ...

The selection of these colors is deeper than you think.

You might not notice a change in the intersection until a moment of confusion costs you time—or worse. Traffic engineers have introduced new signal designs that some safety experts say reduce ...

(CNN) — Whenever Sandra Morgan approaches an intersection as the light shifts from green to yellow, she said she feels a touch of pride. “I’m reminded of my unique family heritage and my grandfather’s ...