RockfallIreland
Traffic rules
Ireland
1. Rockfall
A rockfall warning indicates a road section where rocks or stones may fall from a cliff, cutting or steep slope, or where fallen material may already be present on the road. The danger may affect the full carriageway and can appear suddenly.
Drivers should reduce speed, scan the road and slopes ahead, increase their following distance and remain prepared to stop. They should avoid unnecessary stopping in the exposed section and never attempt to move unstable rocks themselves.
Where might falling rocks be a hazard on roads in Ireland?
Pay extra attention around coastal cliff roads and steep cuttings in hilly regions. After heavy rain, freeze–thaw cycles or work on a steep slope, the hazard may increase depending on local conditions.
🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments
Does a falling-rocks warning sign in Ireland impose a speed limit?
A falling-rocks sign is a hazard warning, not normally a numerical speed-limit sign. Follow any separate speed or closure signs, slow down to match visibility and conditions, and watch for material already on the road.
🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments
Warning for falling rocks.
English • W 164 • Falling rocks. There is a risk of falling or fallen rocks on the road ahead.
Sources
🔗 Commons.wikimedia.org
🔗 Roadguidelines.ie • Department of Transport • Traffic Signs Manual • W 164
SVG source: Government of Ireland – Department of Transport • Public domain • Original revision 2021-10-22. Wikimedia original unmodified.
Artwork verified against Roadguidelines.ie • official published diagram W 164.
What should you do if rocks are blocking the road in Ireland?
Slow or stop in a safe place away from the exposed slope if possible. Do not drive over unstable debris or stop beneath a cliff unnecessarily. Follow any closure or traffic-control instructions and report a dangerous obstruction through the appropriate road authority or emergency channel.
🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments
