DRIVING ON I-20 EASTBOUND. SMELLED AMMONIA, THEN SMELLED BURNT PLASTIC, AIRBAG LIGHT ILLUMINATED, CHECK ENGINE LIGHT ILLUMINATED, INTERIOR LIGHT FLICKERED OFF AND ON, CAR BEGAN TO DECREASE SPEED DESPITE PRESSING ON THE GAS PEDAL. WAS ABLE TO GET CAR INTO THE EMERGENCY LANE BEFORE IT COMPLETELY STOPPED MOVING. HOLE BURNT INTO PASSENGER AREA FROM UNDERNEATH DASH AREA. DEFROST AREA WARPED AND BURNT, BOTTOM OF WINDSHIELD (GLASS PART) BURNT.