The 'falling or fallen rocks' sign is placed along mountainous, hilly, or cliffside roads where rockslides present an active danger.
It warns of two distinct hazards: rocks actively tumbling onto the highway and debris already blocking the driving lanes.
What this sign means
This sign features a cliff face with falling debris falling towards a hillside within a red triangle.
It indicates that geologic conditions make rockfalls likely, especially after heavy rain, freezing weather, or severe storms.
- Red warning triangle depicting falling rock debris
- Found near cuttings, cliffs, and mountain passes
- Warns of hazards both falling and on the road surface
What to do when you see it
Stay alert, drive at a speed that allows you to stop within the distance you can see clear ahead, and avoid stopping directly under unstable cliffs.
- Scan the road surface ahead for loose debris
- Do not stop or park unnecessarily in the hazard zone
- Be extra vigilant after severe weather or rapid freezes
How this sign is tested
Questions check whether you know how to adapt stopping distances to visibility limits around hillside bends.
- Recognising hazard symbols in environmental context
- Adjusting speed for hidden obstructions around bends
- Driver response after heavy weather in rural regions
Common mistakes
Looking up at the cliff face while driving rather than keeping your eyes focused on the road surface for fallen obstacles.
Test yourself on this one
Road and traffic signs is the biggest category in the question bank with 102 questions, and signs turn up inside other categories too. Work through them free, no sign-up needed.
Practise road sign questionsFrequently asked questions
Does this sign mean rocks are currently falling?
It warns that rocks are prone to falling or may already be lying in the road ahead.
Should I sound my horn when seeing this sign?
No. Honking is unnecessary and vibrations could theoretically dislodge loose material.
Why are these signs more common in winter?
Freeze-thaw cycles expand water inside rock cracks, causing boulders to loosen and fall onto roads.