What does a diamond-shaped sign with an arrow indicating a right curve suggest?

The diamond-shaped sign with an arrow indicating a right curve suggests that drivers should prepare for a rightward turn in the road. This type of sign is designed to alert drivers to upcoming changes in the road's direction, particularly when the curve may be sharp enough to require increased caution.

Choosing the option that indicates the highway ahead turns to the right and then to the left implies that there are multiple changes in direction, which is not the primary information communicated by the curve sign. Instead, the sign specifically indicates that a right turn is imminent, without suggesting further direction changes right afterward.

Overall, the key concept is that the sign serves as an early warning for drivers to adjust their speed and steering while approaching the curve, ensuring a safer navigation of the roadway ahead.