Geocache: Safety rail

Another typical hiding location is the safety rails along the roads, streets, highways, parking-lots, etc. Mostly the container is held in place by magnet(s), just like this find. A magnetic container on the safety rail. Most of these are for the statistics, but I met one in Germany which was a really nice big container along the autobahn. This one I found in Detroit around the airport area, as I had nine hours between the two flights. The road with the safety rail. Let's talk about the safety rail for a minute. Did you think about why are they used? Who needs the safety? In most cases they protect cars from entering areas where it would be dangerous, in other cases they separate traffic going different direction to avoid cars trying to pass each others. Then there are some which is placed there to protect pedestrians from vehicles. What else? Any idea, add them in the comments. The container on my tablet. When I first started to make pictures of the geocaches I fo...