I one time stayed on the train for 8 hours because it allows me to catch dinos from one end of the city to the other side and it comes back around again. My food that day consist of just hot dogs because the vendor was serving them just outside the station. I just get off, grab one, and go back onto the train.
Didn’t catch much good dinos either so that day was a complete waste of time.
At least I now know when the train will be out of service for that day.