I guess the only thing to do would be to study any local records of automobile incidents from that time. If police or emergency personnel were contacted by a woman in distress, etc., etc.
It is so much easier for people to put things like this off an nonsense. I believe they do so for their own protection, because they are incapable of dealing with anything that taxes them mentally or emotionally. Like the Man from Taured story I followed from that link. The first comment was "I suppose the source of this story is the internet." -- snicker, snicker behind their hand. That sort of reaction is really a defense mechanism against thought processes they can't handle.
Or check for missing persons reports, as it suggested in the original article.