What does a solid white line at the edge of the road indicate?

• A. The edge of the roadway; do not drive on or across it except in an emergency
• B. A lane boundary between directions
• C. A no-passing line
• D. A parking boundary

Answer: (A)

A solid white edge line marks the boundary of the roadway—the edge of the paved driving surface. It shows where the usable travel area ends, and you shouldn’t drive on or across it except in an emergency to avoid a hazard. This helps keep vehicles on the paved surface and away from the shoulder, which can be soft or unsafe. It’s not a lane boundary between directions, not a no-passing line, and not a parking boundary. If you must leave the pavement, do so only in an emergency.