Traffic Light Signal Diagram - Red, Yellow, and Green Illuminated #1888579 (License: Personal Use)

This image displays a realistic, vertically oriented traffic signal with all three circular lamps-red (top), amber/yellow (middle), and green (bottom)-lit at once. The housing is metallic gray with visors to reduce glare, mounted on a pole against a clean white background, suggesting studio photography for instructional or regulatory use. Such a configuration is not used in normal operation but may appear during maintenance checks or system diagnostics.

Commonly used in driver’s education materials, traffic engineering documentation, road safety campaigns, and web content explaining traffic signal operations or malfunction scenarios. Matches user intent for visual clarification of signal states or technical illustrations.