The Shark Walls

I've often thought these two walls resemble the fins of two sharks passing by each other in the ocean. Do you see it?

What these walls are there for, I believe are to block headlights at night. You see, to the right of where I am standing is a roundabout. So as cars are coming around the bend, it seams like the headlights would shine into the traffic. Perhaps I am wrong, but I don't see any other reason why these walls would have been put in place. Street art?