W339
At a glance
- Sign code
- W339
- Type
- Warning
- Official meaning
- General warning of a danger on the road ahead for which no other warning sign exists.
What the Warning sign means
There is a hazard ahead that does not have its own specific sign, so stay alert.
What you must do
Slow down, look for an accompanying information plate, and be ready to react to whatever the hazard turns out to be.
Know the mistake this sign turns on
Full access adds the confusion Warning is most often mistaken for and the hint for the test, on this sign and every other one — plus practice questions and timed mock papers. The practice sample and the readiness test are free.
See the free practice testSources
- Road Traffic Signs chart, National Department of TransportThe official chart. Sign W339 was checked against it, artwork and meaning, before being published here.
- National Road Traffic Regulations, 2000 — Schedule 1Where the prescribed meaning of each road traffic sign is set out.
Last updated 2026-08-23.