WAS DRIVING VEHICLE GOING 55 MPH AND DASHBOARD FAULTS OUT WITH INCOHERENT READINGS AND TRANSAXLE SHIFTS SELF INTO NEUTRAL. I SHIFT GEAR SELECTOR INTO NEUTRAL AND BACK INTO DRIVE. DASHBOARD READINGS GO BACK TO NORMAL AND TRANSAXLE GOES BACK INTO DRIVE. 15 SECONDS LATER BATTERY LIGHT COMES ON. CONTINUE DRIVING TO FIND A PLACE TO PARK. AFTER ABOUT 10 SECONDS ENGINE STALLS OUT. SHIFT GEAR SELECTOR INTO NEUTRAL AND TRY TO RESTART VEHICLE BUT IT WON'T START. COAST TO A STOP AND OPEN HOOD. NOTICE AN ODD SMELL. OPEN HOOD AND ALTERNATOR IS ON FIRE. CLOSE HOOD AND GRAB PERSONAL BELONGINGS (EXCEPT FOR PHONE CHARGER) OUT OF VEHICLE. CALL 911 AS VEHICLE BURNS UP. FIRE AND POLICE ARRIVE AND EXTINGUISH FIRE BUT VEHICLE BADLY DESTROYED BY BEING ENGULFED IN FLAMES.