What is the meaning of a single solid white line in the center of a roadway?

Answer: A — No passing

A single solid white line in the center of a roadway indicates a no passing zone. This means that drivers are not allowed to pass another vehicle or travel in the opposite direction within that lane. Option B is incorrect because it describes a double solid white line, which indicates that traffic should proceed in the same direction and not cross over. Option C is incorrect because a road ending ahead is commonly marked with a solid white line ending in an arrow pointing towards the direction of the end of the road. Option D is incorrect because turning lanes are typically marked with dotted lines, not a solid white line.