Take the Ultimate Road Signs Quiz and Test Your SkillsWhat should a driver do when they see a red octagon that says 'STOP'?5%Next Correct Incorrect STOP signs require a full stop at the line or before entering the intersection. What should a driver do when they see a red octagon that says 'STOP'? Come to a complete stop and proceed when clear Yield to oncoming traffic No entry Slow down and proceed with caution 5%