Home / Alberta / Questions / Road Signs Road Signs Report A red octagonal sign means: A Slow down B Come to a complete stop C Yield D Merge Show Answer & Explanation Correct Answer: B. Come to a complete stop Stop fully, yield to traffic/pedestrians, proceed when safe. Next More Road Signs Questions A 'Pavement Ends / Gravel Ahead' sign: A 'Divided Highway Begins' sign: A 'Divided Highway Ends' sign: Orange sign with black arrow: A 'Lane Closed Ahead' sign: Often Missed All Alberta Questions Smart Practice Mock Exam Road Signs Guide