I got a ride between Warrensburg MO and KC and back on that when I was young, back in 1988 or so. Dad was stationed at White,an AFB, and the owner at the time, was a flight surgeon there. He hooked us up with a ride. Was very cool, back then we could stand on the vestibule with the windows open. Unfortunately back then, that meant the occasional mist, when someone in the train flushed....all toilets dumps straight to the tracks back then.....