What do signs with arrows pointing left or right, a white background, and a red circle with a red slash indicate?

Answer: C — No turns permitted

Signs featuring arrows pointing left or right, accompanied by a white background and a red circle with a red slash, are universally recognized as indicating that turns in the specified direction are not permitted. This design clearly communicates to drivers that they must continue straight ahead and cannot turn left or right at that intersection or location. This type of signage is crucial for maintaining traffic flow and enhancing safety at intersections where turning could lead to conflicts with other vehicles or pedestrians. Understanding this sign helps drivers make informed decisions, ensuring compliance with traffic regulations and reducing the likelihood of accidents. It's essential for drivers to recognize and obey these signs to avoid potential violations and contribute to overall roadway safety.