What does a solid yellow line indicate?

A solid yellow line indicates that no passing is allowed. This marking is used to inform drivers that they are not permitted to cross the line to overtake another vehicle, primarily due to potential hazards, such as oncoming traffic, visibility issues, or curves in the road that could make passing dangerous.

This is an important safety measure to prevent accidents and ensure that drivers adhere to safe driving practices. The presence of a solid line means that you should stay in your lane and not attempt to pass other vehicles, reinforcing the importance of caution and awareness on the road.

In contrast, a broken yellow line would indicate that passing is permitted when it is safe to do so. Options that suggest it marks the edge of the road or indicates a no parking zone refer to other types of lines, such as solid white lines or different traffic control markings, thus not relevant to this context.