Two Way Traffic sign
The one way road or divided highway you are on is about to carry traffic in both directions.
How to recognise it
This sign is a diamond stood on its point in yellow, the warning colour. Yellow diamonds telling you what the road is about to do. They are advisory rather than mandatory, but ignoring them is how people end up in ditches and how examiners end up failing you.
What the test wants you to know
This is the end of a divided section. The practical consequence is that passing now means using a lane that oncoming traffic is using, which is where head on crashes come from.
Practise it
Reading about a sign is not the same as recognising it in half a second with an examiner watching. Every state road signs test on this site shows the sign and asks you to name it, then shows four faces and asks you to pick the right one.
Right Curve
Left Curve
Cross Road
Side Road
Merge
Lane Ends