I'm assuming that happens in DevMode, right? Does the track load in the viewer normally? If it does, can you see road surface and/or terrain when moving around? Generally speaking, there are few things which must be in to load track successfully to DevMode. - X - triggers (xFinish, xPitIn, xPitOut, xSector1 and xSector2 planes) must be in (=exported in the game) and populated to track's SCN file. Otherwise track can crash. - When there is no existing AIW file (AI waypoint file), the car will spawn to the coordinates 0,0,0. If there is no drivable surface under these coords, car will fall through the ground. Do not use any other track's AIW file. Every track need unique AIW file. If you do not have any drivable surface under 0,0,0, move the whole track in the way that there is road under 0,0,0. Other option is to build temporary road to the nearest drivable surface, which can be removed when proper AIW file is created.