What does a solid yellow line on your side of the road indicate?

A solid yellow line on your side of the road indicates that passing is not allowed. This traffic control marking is designed to warn drivers that, due to visibility or safety concerns, it is unsafe to switch lanes or overtake another vehicle in that area. Solid yellow lines are commonly used on roads where there is limited visibility, such as near curves, intersections, or areas with heavy pedestrian traffic. By adhering to this rule, drivers can help prevent accidents and maintain safer road conditions.

The other options suggest scenarios that do not align with the meaning of a solid yellow line. For example, allowing passing if it's safe or in both directions contradicts the purpose of the solid line, and indicating a bicycle lane is not relevant in this context.