What does a solid yellow line on the roadway indicate?

A solid yellow line on the roadway serves as a critical visual cue for drivers, indicating that passing or changing lanes is not permitted in that area. This rule is essential for maintaining safety, particularly in locations where visibility is limited or where passing could create hazardous situations, such as curves or intersections.

When drivers see a solid yellow line, it is important for them to adhere to this guidance to prevent collisions and enhance road safety for all users, including pedestrians and cyclists. The presence of a solid yellow line communicates that the lane is intended for travel in one direction only, and any attempt to overtake or switch lanes could endanger not only the overtaking vehicle but also others on the road.

This visual cue is often used in scenarios such as two-lane highways where one side is designated for traffic moving in a specific direction. Understanding these markings is crucial for all drivers to navigate roads safely and in accordance with traffic regulations.