AFTER DIRECT FRONTAL IMPACT TO REAR OF STATIONARY SEMI TRACTOR TRAILOR ON AN INTERSTATE IN HEAVY TRAFFIC THE DRIVER STRUCK STEERING WHEEL WITH SEAT BELT ON RESULTING IN MODERATE INJURY REQUIRING TRANSPORT TO EMERGENCY ROOM FOR EVALUATION BUT NOT HOSPITALIZATION. SPEED ESTIMATED AT ABOUT 30 MPH. EXTENSIVE DAMAGE TO FRONT END OF VEHICLE. AIRBAGS DID NOT DEPLOY. SEE PICTURES.