I decided to record this train with my homemade binaural head. I'm still in the testing stages with the microphone, so I don't have all the bugs worked out yet.
The signal distorts right as the train passes, which is unfortunate. The signal distorted at the microphone level, which surprises me because the mics are rated at 125db. Possibly still louder than that at the distanced I mic'd it from. Next time I'll back up the mic about 10 feet to see how it does there.