What does a solid yellow line mean?

A solid yellow line is a clear indication that passing is prohibited. This traffic marking is used to signify that the roadway's conditions are such that it is unsafe for vehicles to overtake one another. Typically, solid yellow lines are found in areas where visibility may be limited, such as curves or hills, and their purpose is to enhance safety by discouraging maneuvering that could lead to collisions.

Understanding the function of road markings like the solid yellow line is crucial for safe driving practices, as it helps maintain orderly traffic flow and reduces the risk of accidents. In contrast, other options suggest scenarios where passing might be allowed or indicate different road features, which can lead to improper driving behavior if misunderstood.