strengthening the area around the highway bridge. a man in a work reflective vest lays stones on a slope in concrete. the soil wil

antierosion architecture area around belt bitumen black bridge building cement cladding concrete construction covered dirt edge embankment erosion fabric green highway hill industrial installation insulation knee laying lays lined man new nonwoven path penetration railroad reflective rock sidewalk sitting slope soil stability stabilization steep stone stones strengthening structure surface surfacing then tile tiles tiling vest wall west wil will work worker yellow