WHILE DRIVING WITH THE WINDOWS CLOSED, THE AIR CONDITIONER ON, WITH THE RECIRCULATE BUTTON LIT AND DASH LEVEL VENTS SELECTED, I WAS OVERCOME BY TRUCK EXHAUST FUMES (A TRUCK PULLED IN MY LANE AHEAD OF ME ON THE ROADWAY) AND BRIEFLY LOST CONTROL OF MY VEHICLE FROM CHOKING AND COUGHING ON IT'S FUMES FROM THE TRUCK EXHAUST. THE FUMES CAME THROUGH THE AIR CONDITIONING SYSTEM WHICH PUMPED THE FUMES INTO MY VEHICLE CABIN. I WAS ON A HIGH SPEED LIMITED ACCESS HIGHWAY AND WAS IN A BUSY AND DANGEROUS AREA AS TWO HIGH SPEED ENTRANCE RAMPS CAME FROM THE RIGHT, ALSO NO SHOULDERS TO STOP DUE TO THE BEGINNING OF A BRIDGE. I WAS ABLE TO SLOW DOWN MY VEHICLE AND STOP COUGHING, SEE AGAIN AND REGAIN CONTROL AFTER OPENING THE WINDOWS AND LETTING THE BAD AIR OUT. *TR