construction cutout flatten isolated machine roadwork roadworks roller rollers steam steam roller black danger erection protection red scaffold scaffolding sign warning warning sign asphalt drive labor labour man operator steamroller working abstract constructions hill hills rock rocks stone stones texture textures wall walls architect build building business draw drawing hand hands pencil plan plans conduit orange pipe pipes plastic pvc reel spool tube tubes tubing balance cabin concrete counterweight crane heavy lift sky steel tower ancient arch architecture cyprus elements historical old ruins Salamis