ON SUN 8/28/05 I WAS DRIVING NORTH ON I69. JUST SOUTH OF EXIT 25 I WAS GOING TO PASS A RV. I CHECKED MY MIRRORS AND THOUGH IT WAS SAFE TO PASS, BUT I MISSED JUDGED THE CAR BEHIND ME AND HE WAS IN MY PASSING LANE. I JERKED BACK INTO MY LANE. WHEN STRAIGHTENING UP SOMETHING POPPED IN MY STEERING. AS A RESULT I WHEN SLIDING SIDEWAYS DOWN THE HIGHWAY. I FINALLY ENDED UP SLOWLY GLIDING DOWN THE GUARD RAIL. I COULD NOT STEER MY CAR. *NM