WHILE DRIVING STRAIGHT DOWN THE HIGHWAY THE THERE WAS A POP SOUND IN THE BACK OF THE VEHICLE AND I WAS UNABLE TO MAINTAIN CONTROL OF THE VEHICLE. THIS LEAD TO THE RAV4 COMING TO A STOP AFTER IMPALING ON GUARDRAIL FROM FREEWAY SPEEDS. UPON INSPECTION IT APPEARED THAT THE REAR LEFT WHEEL WAS THE CAUSE AND WAS AT AN ANGLE INSTEAD OF BEING PERPENDICULAR TO THE GROUND LIKE THE REST OF THE WHEELS.