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

A solid yellow line along the side of the road indicates that no passing is allowed. This marking is used to promote safety by alerting drivers to the presence of conditions that may be hazardous for overtaking another vehicle, such as curves, intersections, or other situations where visibility is limited. The solid line serves as a clear visual cue that drivers should not cross it to pass another vehicle, as doing so could lead to dangerous situations or collisions.

In contrast to this marking, a broken yellow line would indicate that passing is permitted when it is safe to do so. Therefore, understanding the meaning of solid yellow lines is crucial for safe driving practices and adhering to traffic laws.