What is the purpose of traffic signs and signals?

Answer: C — To regulate traffic and ensure safety on the road.

Traffic signs and signals are designed to regulate and control traffic, ensuring the safety and efficiency of vehicles on the road. A Providing information about local landmarks is not the primary purpose of traffic signs and signals. B: While pedestrian signals and signs do exist, they are typically separate from traffic signals and serve a different purpose. D: While some cities may have decorative signs, the primary purpose of traffic signs and signals is to regulate traffic, not to decorate the streets.