Taiwan 2025 - Wavy Blue Lines Along Highway from 101

Think I've posted a pic of this building before, but don't remember the concentric circle patterns on the sidewalk below.  Then, during post-capture, I got to looking at those blue curvy lines at the top along the highway; what could they be?  Thanks to the Bigger Cahoona's awesome full-frame, 48MP ability to crop WAY in, they are revealed to be barriers to prevent debris from ending up on the buildings nearby, and possibly to dampen highway noise as well.  Just a guess...