What do the black double arrows on a yellow diamond sign indicate?

Answer: C — Traffic may flow on both sides

The black double arrows on a yellow diamond sign indicate that traffic may flow on both sides. This sign is a warning to drivers that they must be cautious because vehicles can be traveling in both directions. It is typically found in areas where two lanes of vehicles are either merging or where there may be oncoming traffic, signaling that the roadway is shared. Recognizing this sign is critical for ensuring safe interactions with other vehicles, particularly in situations involving potential hazards, such as narrow roads or when making turns.