What does a solid yellow line on one side of the roadway mean?

A solid yellow line on one side of the roadway signifies that no passing is permitted from that side. This marking is specifically designed to ensure safety by informing drivers of the potential hazards present, indicating that it is not safe to overtake another vehicle in that area. It generally appears on the left side of the roadway, which indicates that drivers in that lane must remain in their position, especially when visibility is limited or when there are curves or intersections ahead that could pose a risk if drivers were to attempt a passing maneuver.

The presence of the solid yellow line serves as a crucial part of traffic control, guiding drivers to adhere to safe driving practices. Other options such as passing being allowed or it indicating a pedestrian zone do not accurately represent the purpose of a solid yellow line; likewise, speed reduction is not directly indicated by a solid yellow line.