What does a solid double yellow line mean?

A solid double yellow line indicates that passing is not allowed in either direction. This road marking is critical for maintaining safety on the road, particularly in areas where visibility may be limited or where it is hazardous to overtake another vehicle. The presence of a solid double line serves as a clear visual cue that drivers must stay in their lanes and cannot cross the line to pass another vehicle. This regulation helps to reduce the risk of collision and ensures that traffic flows safely, especially on two-lane roads. Options indicating passing during certain times or changing lanes safely do not apply here, as the solid double yellow line serves as a strict prohibition against passing, regardless of the circumstances.