In Washington State, what does a solid yellow line indicate?

A solid yellow line in Washington State indicates that no passing is allowed on that side of the line. This line serves as a visual cue to keep drivers informed about safe driving practices and the rules of the road. When you see a solid yellow line, it means that overtaking another vehicle in that lane is prohibited—this is typically because it may be unsafe due to visibility concerns, curves, or other hazards.

In contrast, a broken yellow line would indicate that passing is permitted, while a solid line being placed next to a broken line signifies different rules about passing depending on which side you are driving on. Knowing that a solid yellow line means no passing can help prevent accidents and ensure a safer driving experience.