21. Warning for falling rocks

This traffic sign indicates a warning for falling rocks. It alerts drivers to the risk of rocks falling onto the roadway from adjacent slopes or cliffs. Drivers should reduce speed and stay alert. Be ready for rocks on the road, especially after rain or freezing weather. Avoid stopping near cliffs or slopes. Common Locations: mountain roads, cliffside routes, coastal or hilly terrain.

Warning for falling rocks.

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22. Warning for loose chippings on the road surface

This traffic sign indicates a warning for loose chippings. It alerts drivers to road surfaces covered with loose gravel or stones, which can affect traction and pose a risk of flying debris. Drivers should reduce speed to avoid skidding and keep a safe distance from other vehicles. Be cautious of stone chips that may damage paint or windshields. Common Locations: freshly resurfaced roads, rural or under-maintenance road sections.

Warning for loose chippings on the road surface.

© via Wikimedia.org

23. Warning for a crossing for pedestrians

This traffic sign indicates a warning for a pedestrian crossing. It alerts drivers to an upcoming pedestrian crossing on the road. Drivers should reduce speed and be prepared to yield to pedestrians at the crossing. Common Locations: near bus stops, stations, shopping areas, school zones.

Warning for a crossing for pedestrians.

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24. Warning for a quayside or riverbank

This traffic sign indicates a warning for a quayside or riverbank. It alerts drivers to a waterfront edge, such as a quay, canal, riverbank, or ferry dock, where there is a risk of falling into water if not careful. Drivers should slow down and stay alert, especially at night or in poor visibility. Be cautious in unfenced or unfloodlit quayside areas. Common Locations: riverbanks, canals, harbors, ferry terminals, industrial docks or marinas.

Warning for a quayside or riverbank.

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25. Warning for a road narrowing

This traffic sign indicates a warning for a road narrowing. It alerts drivers the road ahead becomes narrower, reducing the available lane width. Drivers should reduce speed and be cautious of limited space, especially in two-way traffic. Common Locations: construction zones, bridges, underpasses, rural roads or tight curves.

Warning for a road narrowing.

© via Wikimedia.org

26. Warning for a road narrowing on the left

This traffic sign indicates a warning for a road narrowing on the left. It alerts drivers the road will narrow from the left side ahead. Drivers should reduce speed and be cautious of oncoming or merging traffic. Be prepared for obstacles, reduced shoulder, or construction.

Warning for a road narrowing on the left.

© via Wikimedia.org

27. Warning for a road narrowing on the right

This traffic sign indicates a warning for a road narrowing on the right. It alerts drivers the road will narrow from the right side ahead. Drivers should reduce speed and be cautious of oncoming or merging traffic. Be prepared for obstacles, reduced shoulder, or construction.

Warning for a road narrowing on the right.

© via Wikimedia.org

28. Warning for roadworks

This traffic sign indicates a warning for roadworks. It alerts drivers to construction or maintenance work taking place on or near the roadway. Drivers should reduce speed and be prepared for lane changes, narrowings, or temporary signals. Watch for construction workers, equipment, or uneven surfaces.

Warning for roadworks.

© via Wikimedia.org

29. Warning for a slippery road surface

This traffic sign indicates a warning for a slippery road surface. It alerts drivers that the road ahead may be slippery, increasing the risk of skidding—especially in wet, icy, or greasy conditions. Drivers should reduce speed and avoid sudden braking or steering. Be cautious on wet, icy, or newly treated surfaces. Common Locations: bridges, tunnels, or sharp bends.

Warning for a slippery road surface.

© via Wikimedia.org

30. Warning for a soft verge

This traffic sign indicates a warning for a soft verge. The verge might be worn out, soft, slippery or uneven.

Warning for a soft verge.

© via Wikimedia.org