On a rural road, what does a double yellow line indicate?

A double yellow line on a rural road indicates that no passing is permitted in either direction. This marking is used to enhance safety by signaling to drivers that it is illegal to cross the line to overtake another vehicle. The presence of double yellow lines generally suggests that the roadway has conditions—such as limited visibility, curves, or other hazards—where passing would be dangerous. Thus, it serves as a clear regulatory sign aimed at reducing the risk of collisions in these potentially unsafe driving situations.

Though there are other markings that allow passing, the double yellow line strictly prohibits it, making the correct understanding essential for safe driving practices.