Start of dual road: a dual road begins ahead with one way traffic on each side
A dual road begins ahead with one way traffic on each side.
Where you will see it
At the start of a divided section, on a main road leaving a town or on a new stretch of highway.
What to do
Having nothing coming the other way raises neither the limit nor your view: leave one car length for every 15 km/h you are doing. Watch the point where the road opens out, since that is where traffic spreads across both lanes.