Train Traffic Light 5 (Polygon mesh 3D model) is available on CGTrader for $29. Original author: dragosburian. Specs: 10000 polys, 23000 verts.
BLEND (Blender, filesize: 68.9 MB), OBJ (OBJ, filesize: 46.4 MB), DAE (Collada, filesize: 46.4 MB), STL (Stereolithography, filesize: 209 KB)