Solid white lines mark the _____ ____ of roads, bike lanes, and turn lanes.

Answer: C — Outer edge

Solid white lines along the right edge mark the outer boundary of the paved roadway. They show where the driving surface ends and where a bike lane or shoulder begins, helping you stay inside the usable roadway and avoid drifting into cyclists or off the pavement. Crossing this line is generally discouraged unless you’re turning onto another road or entering a driveway, and you should be mindful of riders in the bike lane if one is present. The center of the road is defined by lines in the middle of the lane (often yellow), and the same-type lines inside the road help separate traffic lanes; it’s this outer edge line that specifically indicates the boundary of the road itself.