0898fffa_s__2_plus_1_roads__and_Signals__WHAT_THEY_MEAN
[ROAD MARKINGS] Single or double continuous white lines along the centre of the road [WHAT THEY MEAN] 
All traffic must keep to the left of the line (except in an emergency or for access).
Traffic Signs, Roadway Markings, 2-plus-1 roads, and Signals
WHAT THEY MEAN