OK, here you go. Talk to her, explain why you're reluctant, you've been robbed before. If she's ok with it, then call the cops. Again explain the situation, that you're willing to drive her home, but am worried about your own safety. They can decide if she's a decent risk for a ride. Plus, they know you took her home, they know both your names, so you're both protected to some extent now that the police are involved. If she turns out to be free of weapons and/or a criminal record, THEN I'd drive her home. While I've never driven public transportation, I have driven for a living, and did something like this for someone who was stranded. In my case, everything worked out just fine. Stranded person got home, I did a good deed, cops did their job professionally (and this was almost 40 years ago).