Risk of Falling Rocks Post Mounted Sign - Dia 559 R2/RA2 (Face Only)The falling rocks road sign diagram 559 is the sign to indicate a risk of falling or fallen rocks onto the junction from either side, its variants indicate whether they may fall from the Right or from the Left. If rocks may fall from either side such as in a gorge, the left hand side variant should be used. This can be supplemented For and the distance drivers should be cautious of fallen or falling rocks as a hazard. The sign is available in 450mm to