To make you aware of your speed
These lines may be painted on the road on the approach to a roundabout, village or a particular hazard. The lines are raised and painted yellow and their purpose is to make you aware of your speed. Reduce your speed in good time so that you avoid having to brake harshly over the last few metres before reaching the junction.
B To show a safe distance between vehicles
C To keep the area clear of traffic
D To warn you to change direction