A 2010 MACK TRUCK TRACTOR EQUIPPED WITH A DIESEL PARTICULATE FILTER TYPE EXHAUST SYSTEM SPONTANEOUSLY CAUGHT FIRE WHILE IN REGENERATION MODE AS THE VEHICLE WAS TRAVELING DOWN AN INTERSTATE HIGHWAY. FIRE CONSUMED THE CAB OF THE TRUCK RESULTING IN A TOTAL LOSS TO THE VEHICLE. DRIVER OF VEHICLE SUFFERED BURNS AND SMOKE INHALATION INJURIES IN AN ATTEMPT TO PUT THE FIRE OUT.