What does a double yellow line indicate?

Answer: B — No passing in either direction

A double yellow line is a visual cue on the road that is designed to communicate important information regarding lane usage. Specifically, it indicates that there is no passing allowed in either direction. This is typically implemented in areas where visibility may be limited or where it is unsafe for vehicles to overtake one another, such as in curves or at intersections. The presence of this marking is a clear signal to drivers that they should not cross the lines to pass another vehicle. In contrast, a single lane of traffic in both directions, allowing passing with caution, or permitting only one lane of traffic are not indicated by double yellow lines. These markings serve as a strict guideline to maintain safety on the road, emphasizing the importance of observing traffic rules to prevent accidents.