What does a solid yellow line mean?

A solid yellow line indicates that no passing is allowed. This marking is used to inform drivers that they must not cross the line to overtake another vehicle, as doing so could create a dangerous situation. Solid yellow lines are typically found in scenarios where visibility is limited, such as on hills or curves, or where there are high-speed conditions, which further emphasizes the importance of adhering to this rule for the safety of all road users.

In contrast to this, the other options pertain to different traffic regulations. For instance, a solid line does not govern turning or parking rules directly, nor does it indicate areas where entry is prohibited. Thus, understanding what the solid yellow line signifies is crucial for maintaining safe driving practices.