Over the last several months, the Empire Builder has often vanished from the status map whenever it falls terribly behind schedule. Whether it's a deadhead No.7 moving from Whitefish to Spokane to be turned and positioned for the next day (while bustitution is underway), or a revenue move that continues on several hours late, the trains simply aren't being shown. In the same way, a status check at Amtrak's site will simply say "service interruption" instead of giving actual arrival/departure times when the situation becomes a big enough embarrassment.