What instruction does sign B7 provide?

Sign B7 is indicative of a directive for drivers, specifically instructing them to make a left turn at the next intersection. This type of sign is crucial for ensuring that the flow of traffic is organized and predictable, guiding drivers safely through intersections or roadways where a left turn is necessary. It serves to yield to the structural guidance of road layouts or a planned traffic movement, helping to prevent confusion and potential accidents. Understanding such indications on the road is vital for maintaining safety and efficient traffic flow.