Traffic Light Signal Diagram - Red, Yellow, Green Indicators Explained #3630449 (License: Personal Use)

This image depicts a standard vertical traffic signal used worldwide to regulate vehicular and pedestrian movement at intersections. The red light at the top indicates stop, the amber/yellow in the middle signals caution or impending change, and the green at the bottom authorizes movement. The housing is black with evenly spaced, uniformly sized circular lamps for high visibility.

Used in transportation safety guides, driver education materials, traffic engineering resources, and municipal signage documentation; matches user intent for learning traffic rules, designing road infrastructure, or illustrating regulatory signage.