If I see something like this, and I do not know what it means, I can't stop thinking about it. Is it a barrier, a fence or a track? What is the importance for cyclists? I've solved the puzzle:
It is an own creation of the Austrian Federal Railways (ÖBB). Around the new railway and bridge projects across the Rhine in the St. Margrethen-Lauterach area, they have created an information route for cyclists. If you follow this sign, you will see several information boards about the construction project. St. Margrethen, Switzerland, July 31, 2012.