What indicates the outer edge of a roadway, and it may be crossed only by traffic moving to or from the shoulder?

Answer: C — Solid white line

In Washington State, a solid white line indicates the outer edge of a roadway. It separates the travel lane from the shoulder and may only be crossed by traffic moving to or from the shoulder. It is important for drivers to pay attention to these lane markings as crossing a solid white line when it is not safe to do so may result in a traffic violation. The other options: A. Broken white line, is typically seen in situations where passing is allowed. B. Double yellow line, indicates a no-passing zone where passing is not allowed. D. Dashed yellow line, is used to separate traffic traveling in opposite directions.