A double solid yellow line indicates what about traffic?

A double solid yellow line signifies that passing is not allowed for vehicles traveling in either direction. This road marking is used to indicate that it is unsafe to overtake or pass other vehicles, typically due to limited visibility, curves, or other hazards in the roadway. The purpose of this restriction is to enhance safety and prevent collisions associated with illegal passing maneuvers. Thus, the presence of a double solid yellow line serves as a clear warning to drivers that they must remain in their lanes without attempting to cross into oncoming traffic, which maintains order and reduces the risk of accidents.