WHILE DRIVING IN THE RAIN AT APPROXIMATELY 35 MPH HYDROPLANED ON AN HIGHWAY EXIT RAMP THAT WAS A SHARP LOOP/CURVE. THE CAR HIT HEAD ON THE END OF THE GUARDRAIL WHICH HAD A SQUARE PLATE. THE ENTIRE FRONT END AND HOOD OF THE CAMRY WAS SMASHED AND THE AIR BAGS NEVER DEPLOYED. I WAS WEARING MY SEAT BELT WHICH SOMEWHAT RESTRAINED ME BUT HIT MY HEAD ON THE STEERING WHEEL AND SUFFERED A CONCUSSION. *TR