CAR WAS IN MOTION MAKING A KNOCKING SOUND. CAR FELT LIKE IT WAS GOING TO STALL SO I PULLED OVER TO THE SHOULDER. CAR STALLED WHEN I STOPPED. I TRIED TO START THE ENGINE AGAIN BUT ALL OF THE WARNING LIGHTS CAME ON AND NOTHING HAPPENED. I NOTICED LIGHT GRAY SMOKE COMING FROM UNDER THE HOOD. I WAS GOING TO POP THE HOOD TO CHECK IF THE CAR WAS OVERHEATING AND SMOKE BECAME THICKER AND BLACK SO ME AND MY KIDS EXITED THE CAR AND WENT A SAFE DISTANCE FROM THE CAR AND I CALLED 911.