It's not a problem of the scenery, but a problem with your video card settings, and this will affect any scenery with fully-custom runway textures.
Use the following settings on your video card control panel:
- Set Anisotropic filter to Override any application setting
- Set the filter to 8x or 16x
- Set antialiasing to Override any application setting and set it to 2x at least, 4x it's better
