What does a solid double yellow line indicate?

Answer: B — No passing

A solid double yellow line on the road serves as a crucial traffic control marker, indicating that no passing is allowed in either direction. This roadway marking is designed to enhance safety by discouraging vehicles from attempting to overtake one another in areas where it could be hazardous, such as oncoming traffic or limited visibility. When drivers see a solid double yellow line, it's a clear sign that they should remain in their lane and refrain from any passing maneuvers. The other options are not applicable in this case; passing is prohibited, so options suggesting that passing is allowed or that it indicates turning or construction are incorrect. A solid double yellow line's primary purpose is to maintain safe driving conditions and to ensure that vehicles remain in their designated lanes.