Traffic Light Signal Diagram - Red, Yellow, Green Indicators Explained #3478319 (License: Personal Use)

The image displays a classic three-light vertical traffic signal mounted on a pole, with the red light currently active, indicating vehicles must stop. Side-facing auxiliary lights emit colored beams-red to the left and yellow to the right-enhancing visibility for approaching drivers. The design follows international standards for road signage clarity and safety.

Used in driver’s education materials, transportation safety websites, municipal traffic guides, and traffic engineering documentation to illustrate signal operation and compliance requirements.