What does a solid double yellow line indicate?

Answer: C — No passing allowed

A solid double yellow line indicates that no passing is allowed in either direction. This marking is used to signify that it is unsafe to overtake the vehicle in front, often due to poor visibility, hills, curves, or other hazards. The purpose of this line is to promote safety on the roadway by preventing drivers from attempting to pass when it could lead to a collision. In addition, the presence of a solid double yellow line serves as a clear visual cue to keep drivers within their designated lanes. It emphasizes the importance of adhering to traffic laws to reduce the risk of accidents. Understanding this marking is crucial for all drivers, as it helps maintain order on the road and ensures the safety of all users.