Gravel or debris
in the road
For specific hazards where the effect will be a potentially slippery surface, take your outstretched hand, palm down and wave at the floor. This can also be used for a broken or unconsolidated road surface.
Optional call: “Gravel, Mud, Ice, Loose!”
Calling out the nature of the hazard loudly can add extra important information to your fellow cyclists. Ensure you use clear, single-word calls to avoid confusion.