Railway Semaphore 2 Low-poly 3D model is available on CGTrader for $39. Original author: dragosburian. Specs: 10000 polys, 23000 verts.
BLEND (Blender, filesize: 108 MB), OBJ (OBJ, filesize: 85 MB), FBX (Autodesk FBX, filesize: 171 MB), STL (Stereolithography, filesize: 214 KB), DAE (Collada, filesize: 85.2 MB), TEXTURES (Textures, filesize: 85.2 MB), PNG (PNG, filesize: 85.2 MB)