What does a yellow diamond-shaped sign with an arrow turning sharply to the right indicate?

A yellow diamond-shaped sign with an arrow turning sharply to the right serves as a warning to drivers about a significant change in the road's direction. Specifically, it conveys that the highway or roadway ahead has a sharp right turn. This type of signage is crucial for ensuring that drivers are prepared for the upcoming curve, allowing them to adjust their speed and positioning accordingly to navigate the turn safely.

In this context, recognizing the meaning of such signs enhances overall road safety, as it alerts drivers to potential hazards associated with abrupt changes in direction. The other options do not accurately represent the sign's intention; they either describe a turn in the opposite direction, a merging situation, or suggest that speeding up is appropriate, which contradicts safe driving practices in situations where additional caution is needed.