Traffic Light Signal Diagram - Red, Yellow, Green Illumination Explained #3223472 (License: Personal Use)

This illustration depicts a standard vertical traffic light assembly mounted on a pole, featuring three circular lamps-red (top), yellow (middle), and green (bottom)-all visibly illuminated, with the red light glowing brightest to indicate stop. Side-mounted directional beams emit red and yellow light, suggesting auxiliary signaling for cross-traffic or pedestrian phases. The design includes a spherical visor atop the housing and metallic casing with reflective hoods around each lamp.

Used in transportation safety guides, driver’s education materials, traffic engineering documentation, and web articles explaining signal operations; matches user intent for learning how traffic lights function or visualizing signal states for instructional purposes.