0898fffa_s__2_plus_1_roads__and_Signals__WHAT_THEY_MEAN
[ROAD MARKINGS] A broken white line with a single white line along the centre of the road [WHAT THEY MEAN] 
The driver must obey the line that is nearest to them. In this picture, the driver in the car must remain to the left of the continuous white line.
Traffic Signs, Roadway Markings, 2-plus-1 roads, and Signals
WHAT THEY MEAN