freeway bridge drainage. a sound-absorbing wall with holes from gutter

wall rock ruins monument temple building sculpture art landmark statue stonewall fortification brick history memorial geology freeway bridge drainage sound-absorbing holes water gutters collect gutter line pipe flexi rubber connection slowing absorbing absorption barriers bellow bent cascade cascading cobblestone concrete cube curved dirt drain flow gray green highway hill hole industrial landscaping lawn long noise perforated road roof rough sewage shaft slope slow soil sound splash steep steeple sump tube drainage line connection