Also agreed, I'm glad she had a passenger to make the call, because I am Not sure that the driver would have reacted quickly enough.
The last thing I want my daughter doing is confronting some maniac on the highway. I would like to think I will have raised her to do the right thing and handle herself in that situation, but you have no idea what other people are capable of.
Now, on the other hand, as a parent to one of these girls, that bitch better watch her back.