Which of these is a hazard warning line?
You need to know the difference between the normal centre line and a hazard warning line. If there’s a hazard ahead, the markings are longer and the gaps shorter. This gives you advance warning of an unspecified hazard.
Road markings along the road
Below are the road line markings for the centre line on a single carriageway road.
This next image shows the road markings for a lane line separating traffic travelling in the same direction (single or dual carriageway road).
And this third image shows the hazard warning line. This replaces a centre line or a lane line shown such as those shown above. In addition, an upright sign may indicate the nature of the hazard, such as a bend. This type of road marking is also used on the approach to a junction.