Traffic Light Signal Diagram - Road Safety & Traffic Control Guide #1888633 (License: Personal Use)

This high-resolution illustration depicts a conventional vertical traffic signal with three circular lamps housed in a polished gold-colored casing, each secured by visible bolts. The red lamp is lit at the top, indicating stop; the amber (yellow) middle lamp is unlit but ready for transition; and the green bottom lamp remains off, awaiting activation. The design reflects real-world urban infrastructure used globally to regulate vehicle and pedestrian flow.

Used on transportation safety pages, driver education sites, municipal traffic guides, and traffic engineering resources. Matches user intent for understanding signal operations, preparing for driving tests, or designing road signage systems.