Could there be intersecting traffic on the same level further ahead on this road?
Only motorways and clearways are guaranteed to be free from intersecting traffic on the same level.
‘On the same level’ here refers to a regular junction where there is a risk of colliding with intersecting traffic. Traffic that crosses the road via a bridge is not on the same level.
The road you are on is a priority road, and just here there is a central barrier. There may however be junctions on the same level further ahead.
This sign is shown:
Neither of these signs are shown:
More examples of explanations: