What is the standard top-to-bottom order of a vertical traffic signal?

Correct answer: A – Red, yellow, green
A standard vertical traffic signal displays red at the top, yellow in the middle, and green at the bottom. North Carolina law specifically requires the red light on a vertically arranged signal face to appear above the yellow and green lights. On a horizontal signal, red appears to their left.
Source: G.S. 20-158(a)(3) – Vehicle control signs and signals, North Carolina Driver Handbook — Ch. 5, “Traffic Signals”



