Here is a Collection for the railroad barrier 4m as low and high-poly version.
BLEND (Blender, filesize: 666 MB), OBJ (OBJ, filesize: 666 MB), FBX (Autodesk FBX, filesize: 666 MB), GLTF (glTF, filesize: 666 MB), ABC (Alembic, filesize: 666 MB), DAE (Collada, filesize: 666 MB), DXF (DXF, filesize: 666 MB), STL (Stereolithography, filesize: 666 MB), TEXTURES (Textures, filesize: 556 MB), JPG (JPG, filesize: 556 MB), PLY (Ply, filesize: 556 MB)