What does a solid white line indicate on the right side of the road?

Answer: B — Road edge

A solid white line on the right side of the road indicates the edge of the roadway. It serves to mark the boundary between the pavement and the area that is not meant for vehicular travel, such as the shoulder or any unpaved area adjacent to the road. This clear delineation is essential for safety, as it helps drivers maintain their position on the road and encourages them to stay within the designated driving area. Understanding this marking is crucial for navigating roadways safely, as it signifies where it is unsafe or illegal to drive. The other options do not accurately reflect the function of a solid white line. An end of a lane would typically be indicated by different markings that may be dashed or a different configuration, while a crosswalk would be marked with specific patterns that are visible at pedestrian crossings. Intersections usually do not have solid white lines marking their boundaries; they are often defined by other road markings or signage.