Concept:Road signs are standard traffic aids that guide road users safely by controlling movement and sharing useful details.
Explanation:Road signs are not used to punish, persuade, or force opinions.
They mainly serve two clear purposes.
Regulatory signs tell road users what they must or must not do, such as stopping at a stop sign.
Informative signs give directions, distances, road conditions, and locations of interest.
So the usual role of road signs is to regulate traffic and provide information.
Answer:D. regulatory and informative.