Home / Alberta / Questions / Road Signs Road Signs Report A yellow diamond with three coloured circles (red/yellow/green): A Traffic signal ahead B School zone C Power line D Pedestrian crossing Show Answer & Explanation Correct Answer: A. Traffic signal ahead Begin scanning for signal colour. Previous Next More Road Signs Questions Flashing hand with countdown means: A white diamond on green sign marks: A yellow sign with walking pedestrian figure: A white X 'Railway Crossing' sign: Lane-use arrow signs mean: Often Missed All Alberta Questions Smart Practice Mock Exam Road Signs Guide