All along the motorway these things are mounted on the crash barrier between the lanes. There's one crash barrier for each direction of traffic and only one of them has these things mounted.
There's a couple of different colors, the darker ones fewer, no idea if that is on purpose or coincidence. There's some with white and red stripes at regular intervals.
I can't figure the purpose of these, does anyone know?
Wish we had that in Germany. As great as the autobahn is, when it rains it reflects so much that you don't see the Markings anymore without highbeams.
But maybe that's a northern thing.