I had a friend who used to fall asleep regularly on the first train after a night out and would wake up in the farthest reaches of the opposite direction of his home.
I had a weird sixth sense about sleeping too long on the bus/train and rarely went more than a couple stops too far. I think my record was an extra half mile on a quiet night with nowhere to be but bed.
I used to have a really long commute when I lived in Tokyo and would regularly nap on the train. I was always amazed (and grateful) when I would wake up just as the train pulled into my station.