What does a solid double yellow line mean?

A solid double yellow line indicates that no passing is allowed in either direction. This road marking serves as a clear legal restriction meant to enhance safety on the road. It is used in areas where visibility is limited or where passing would otherwise be dangerous, such as curves, hills, or near intersections. The presence of a double line reinforces the idea that the lane is too hazardous for a normal passing maneuver, making it essential for drivers to stay in their lane and avoid overtaking other vehicles. Consequently, this marking is a critical part of traffic regulations, aiming to reduce accidents and ensure safe driving practices.