What road markings might accompany the "Keep Left" sign?

The "Keep Left" sign is intended to guide drivers to remain on the left side of the road. An arrow pointing left reinforces this instruction by visually indicating the direction in which vehicles should travel. The presence of this arrow helps to ensure clarity and compliance, especially at junctions or areas where the roadway may otherwise confuse drivers.

The other options represent different circumstances or instructions. A solid yellow line usually indicates no parking or no overtaking; a broken white line denotes that overtaking is allowed when safe; while a circle with a cross often indicates a priority junction or that the road ahead is closed to traffic. None of these convey the specific instruction to keep to the left as directly and clearly as an arrow pointing left.