Tileable single sided traffic barrier guardrail V2 Low-poly 3D model is available on CGTrader for $19. Original author: dragosburian. Specs: 2722 polys, 5256 verts.
BLEND (Blender, filesize: 125 MB), OBJ (OBJ, filesize: 61 MB), FBX (Autodesk FBX, filesize: 61.3 MB), DAE (Collada, filesize: 61.1 MB), TEXTURES (Textures, filesize: 61.1 MB), PNG (PNG, filesize: 61.1 MB), STL (Stereolithography, filesize: 107 KB)