In plain English
Two roads are about to cross yours. Traffic could appear from the left or the right, so ease off and get your eyes moving early.
Where you'll see it
On country roads and outside towns, before junctions that are hard to spot — especially where hedges or bends hide the crossing traffic.
The common trap
Thinking the thicker line always means you have priority. The sign warns you the junction exists — it says nothing about who goes first.
Memory anchor
A plus sign in a triangle: roads adding together. More roads = more eyes needed.
Quick check