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RockfallUnited Kingdom

An introduction to the traffic rules and road signs of United Kingdom. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

Traffic signs
Traffic rules
United Kingdom

28. 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.

Rockfall
Falling-rocks warning sign. (Mid Devon, United Kingdom)
Wikimedia.org • Lewis Clarke • CC BY-SA
Where might falling rocks be a hazard on roads in the United Kingdom?

Pay extra attention around steep coastal cliffs, rock cuttings and upland roads. After heavy rain, freeze–thaw cycles or work on a steep slope, the hazard may increase depending on local conditions.

🔗 gov.uk • Great Britain Highway Code: Rules 109,125–126; breakdown/obstruction Rule 280

🔗 gov.uk • DfT Know Your Traffic Signs: warning signs (Great Britain)

Does a falling-rocks warning sign in the United Kingdom 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.

🔗 gov.uk • Great Britain Highway Code: Rules 109,125–126; breakdown/obstruction Rule 280

🔗 gov.uk • DfT Know Your Traffic Signs: warning signs (Great Britain)

Warning for falling rocks. Warning for falling rocks.

English • GB diagram 559 • Falling or fallen rocks. There is a risk of rocks falling or lying on the road ahead.

Sources

🔗 Commons.wikimedia.org (Government of the United Kingdom – Department for Transport • Crown copyright • OGL v1.0)
🔗 Legislation.gov.uk • Traffic Signs Regulations and General Directions • Great Britain
🔗 Gov.uk • Department for Transport • Know your traffic signs

SVG source: Government of the United Kingdom – Department for Transport • OGL v1.0 • Original revision 2022-02-27. Wikimedia original unmodified. © Crown copyright. Traffic signs are Crown copyright. You may reproduce traffic signs free of charge and without having to seek permission, but you must reproduce them accurately and not in a misleading context (e.g. not on roadside billboards where they could mislead drivers). (ref [1])

Artwork verified against Gov.uk • official published diagram 559.

Current design and permitted variants verified against Legislation.gov.uk • TSRGD, current text.

What should you do if rocks are blocking the road in the United Kingdom?

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.

🔗 gov.uk • Great Britain Highway Code: Rules 109,125–126; breakdown/obstruction Rule 280

🔗 gov.uk • DfT Know Your Traffic Signs: warning signs (Great Britain)

1 United Kingdom 2 Motorway 3 Speed limit 4 Bike path 5 Pedestrian warning 6 Bridge 7 Speed bump 8 Toll road 9 One-way traffic 10 Quay 11 Slope 12 Bus lane 13 Bus stop 14 Dead end 15 Stop sign 16 Give way 17 Roundabout 18 Road narrowing 19 Priority over oncoming traffic 20 Give way to oncoming traffic 21 Pedestrian crossing 22 Railway crossing 23 Mandatory direction 24 Turn prohibition 25 School area 26 Crossing animals 27 Slippery road 28 Rockfall 29 Aircraft 30 Curve 31 Chevron 32 Wrong-way driving 33 Roadworks 34 Height limit 35 Radar speed sign 36 Selective barriers 37 Low-emission zone 38 Priority at the next junction 39 Traffic lights 40 Traffic lights warning 41 Road markings 42 Climbing lane 43 Bike box 44 Left-hand traffic 45 Speed feedback 46 Driving licence 47 Cycling route 48 Parking 49 No parking 50 Park and ride 51 Disabled parking 52 Reversing 53 Detour 54 Road surface 55 Verge 56 Traffic calming 57 Horse riding 58 Emergency exit 59 City limit 60 Tourist attraction 61 Licence plate 62 Charging station 63 Dangers 64 Dip 65 Tram lane 66 Cyclist 67 Bus 68 Police 69 Ambulance 70 Roadway 71 Street 72 Pothole 73 Private road 74 Path 75 Particulates 76 Air pollution 77 Rush hour 78 Road code 79 Two-way traffic 80 Tram stop 81 Street gutter 82 Cargo bike 83 Forestry vehicle 84 Construction vehicle 85 Semi-trailer truck 86 Trolleybus 87 Speed pedelec 88 Delivery vehicle 89 Idling 90 Tow truck 91 Four-wheel drive 92 Passenger 93 Bicycle 94 Motorcycle equipment 95 Tram 96 Rail track 97 Public transport 98 Caravan 99 Trailer 100 Tow hitch ...