Having never driven over RR tracks, it begs the question, Could She just get some speed up and jump back across the tracks, or must a wrecker be called?
It's quite hard to climb over a rail and must be approached close to 90 degrees to it to have a chance. Once you're locked in like that you can't turn sharply enough to present the width of your tyre at close to 90 degrees and your wheels will simply skid along it. She needs to get to a level crossing.