Here are some road signs you can use for post-apocalyptic game environments as well as road planning. Textures are 2k and 4k, you can customize the model as you wish, there are low quality and high quality model options.
BLEND (Blender, filesize: 478 MB), BLEND (Blender, filesize: 478 MB), OBJ (OBJ, filesize: 476 MB), FBX (Autodesk FBX, filesize: 488 MB), SPP (Substance Painter, filesize: 445 MB)