Final answer:
An octagon road sign conveys the message of a stop sign. Stop signs are used to indicate that drivers must come to a complete stop at a designated point on the road.
Step-by-step explanation:
An octagon road sign conveys the message of a stop sign. Stop signs are one of the most common octagon-shaped road signs that you will encounter while driving. They are used to indicate that drivers must come to a complete stop at a designated point on the road. This is typically done at intersections to prioritize the flow of traffic and ensure safety.