What does a double yellow line signify on the road?

A double yellow line on the road signifies that no passing is allowed in either direction. This marking is crucial for maintaining safety, especially on two-lane roads where vehicles travel in opposite directions. The presence of double yellow lines indicates that the area is potentially hazardous for overtaking other vehicles, such as in curves, hills, or areas with poor visibility. It serves as a clear visual cue that drivers should remain in their lanes and not attempt to pass, thus minimizing the risk of collision.