Traffic Light Signals Explained - Red, Yellow, Green Meaning and Usage #1840759 (License: Personal Use)

This image displays three standard vertical traffic light units, each illuminated with one of the three primary signal colors: red at the top indicating stop, amber/yellow in the middle signaling caution or prepare to stop, and green at the bottom permitting movement. The lights feature classic black casings with convex lenses and internal honeycomb reflectors for optimal visibility and glare reduction.

Used on transportation safety websites, driver education materials, traffic engineering resources, and municipal road signage guides; targets users seeking to understand traffic signal protocols or preparing for driving exams.