Preassembled building parts, shaped parts, profile parts of metal, and sheets and plates of metal in the form of crash barriers, crash walls, skid barriers, guard walls, noise protection embankments and sight-screen walls for roads; building parts, shaped parts and profile parts of metal for crash barriers, crash walls and skid barriers, guard walls, noise protection embankments and sight-screen walls for roads; road signs and panels, non-luminous and non-mechanical, of metal, for roads; meta...