Check out F1 Track Concept 3D model on CGTrader for $89.99. High-quality mesh by Alpha92: 349141 polys, 285823 vertices. Textured, UV Mapped.
OBJ (OBJ, filesize: 8.71 MB), FBX (Autodesk FBX, filesize: 10.7 MB), JPG (JPG, filesize: 22.6 MB), PNG (PNG, filesize: 22.6 MB), SKP (Sketchup, filesize: 6.47 MB), MAX (Autodesk 3ds Max, filesize: 5.52 MB)