Horizontal Traffic Light 🚥
Copy & Meaning

A horizontal traffic light — the three-color signal system that coordinates traffic flow at intersections worldwide, using universally understood colors (red=stop, yellow=caution, green=go) that have been adopted as metaphors far beyond traffic. Traffic light systems appear in project management (RAG status), health and safety ratings, and countless other contexts where three-level status needs visual communication.

The traffic light's simple but effective color language is one of the most successful design achievements in human history. Used for traffic and driving content, status communication in professional contexts, and metaphors about permission, caution, and prohibition in everyday situations.