as the whole earth is curved then technically no, if it's on the ground following the curvature, then that would mean the train is accelerating as the velocity is constantly changing. Now if the track engineers were to take the curvature into account then I suppose it might work
that's because I didn't I said if you took certain things into consideration then maybe what you said may hold true, but that is only if you include them as opposed to jumping to conclusions. As other posters pointed out there are way to many variables to answer the OP's qestion