When you write specifications for pipeline markers or cable route markers, you can better protect your buried facilities if you specify markers with warning messages which can be seen from all directions.
In this application, it looks the facility owner has been very diligent about making their pipeline marker visible, but you can see the evolution.
The old style flat fiberglass post was probably installed first, and from the front the warning message and post are visible. It looks like a tech decided it was hard to see the old flat fiberglass post from the dye, so they spray painted the metal fence post.
In the end they concluded that a triangular shaped Rhino TriView® solved all their problems with one post.
The moral of the story is to save yourself time & money, and alert excavators that you have a facility in the area no matter where they area standing by starting with a TriView.