What is the recommended action when there is a hill or curve obstructing visibility for drivers?

When approaching a situation where a hill or curve obstructs visibility for drivers, placing one triangle on the other side of the hill or curve is the recommended action. This ensures that other drivers can see the warning signal from a distance, allowing them to slow down or take necessary precautions as they approach the obstruction. The visibility is essential for ensuring safety, as drivers need to be alerted about potential hazards ahead.

By positioning a triangle on the side opposite to the hill or curve, it creates a trail of visibility that informs approaching vehicles of the potential danger from around the bend. This action helps to prevent accidents that may arise from sudden visibility loss. Making sure that the triangle is placed strategically allows for better communication to other drivers about the situation ahead, promoting safe driving practices in areas where visibility might be compromised.