The sign "Arrow markings" refers to the lane usage markings painted on the roadway. These markings indicate the allowed movements or directions in which vehicles can travel in the lanes below them.

For example, if you see arrows pointing straight ahead in a lane, you are permitted to continue straight. If the arrows indicate a turn, such as left or right, you must follow these instructions and turn accordingly if you are in that lane.

It's important to adhere to these markings as they help in maintaining order on the road, especially at intersections, and ensure that traffic flows smoothly. Ignoring these markings can lead to traffic violations and potentially dangerous situations. Always be aware of the arrow markings when changing lanes or approaching intersections.