The lights spontaneously turned off while driving on a cloudy night on an unlit section of interstate. While slowing the car down, it went onto gravel, semi-circled around and flipped over onto the lower median. No air bag deployed. No protection from shoulder seat belt. Head hit steering wheel, and I briefly lost consciousness. Tests showed skull and cervical fractures. The car was "totaled." I was planning a move. Now I consider myself to be lucky to be alive. I am rewriting because of previous a NHTSA computer malfunction changing a serious injury to "NO" injury on the questionnaire.