Traffic Light Signal System

This illustration showcases three distinct states of a modern traffic light system. On the left, we see a signal with all three lights — red, amber (or orange), and green — lit up, which could represent a diagnostic mode or a combined display. The middle signal clearly indicates a stop with its illuminated red light, while the signal on the right gives a clear 'go' with its green light. Together, these elements demonstrate the fundamental visual cues used in road traffic control.

traffic light - signal - road control - stop - go - amber - red light - green light