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Rocks in South-Africa

 
  If you are in rocksigns and visiting South-Africa, take some extra film and a sketch-book with you. This type of warning-signs seems left out of the standardization programme: every pass, almost every curve has his own version. After days of new variants continuously coming up I didn't feel much like road sign collecting any more. Team members had a hard job cheering me up.  
Ceres (Michell's Pass), VII.1997 Cape Town, VII.1997
  Although the variation is enormous, it is possible to bring some structure into the collection.

The number of boulders is constant: seven stones, no more no less. Given the number of panels, this is extra-ordinary. But further analysis revealed that the size of the stones could help to clear things up. The samples lead us to distinguish two main groups.

 
Citrusdal, VII.1997 Prince Albert - Beaufort West, VII.1997
 
The first group (left column) has seven stones of about the same size each. The artist seems to be free in the positioning of the stones: sometimes close to the wall, at other times drifting away.

The second group (right column) features boulders together with gravel-like stones. The position of the stones on the contrary, is more or less constant.

  The British rock warning sign has similar looks (and probably inspired the South-African counterpart), but comes out quite different if you look a bit closer to the disposition of the pebbles.
 
  This panel has been mounted with the wrong side down, creating the illusion of boulders escaping from earth.
Visit USA, Armenia or Belgium for more. I suppose that engineers from Jordan took exactly this traffic sign as an example to furnish the Desert Highway.
Zwartberg Pass; Oudtshoorn side (VII.1997)

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More signs from South-Africa: Men at work - Children crossing