 Situations in which TFRs are typically used include forest fires and other natural disasters, air shows, some instances of criminal activity, extensions of restricted airspace to allow expansion of military training operations, and during movement of the President and certain other high-level government officials.A Military Training Route is a specific route allowing high speed, low-level flight by military aircraft for training purposes.Specifically, these routes allow participating military aircraft to exceed the normal 250 knot speed limit which applies to all aircraft operating below 10,000 feet MSL.