How to set up a train schedule content type in Drupal 7?
This post is pretty old at this point, so it may no longer be an issue for you, but I'll try to answer it anyway.

The type of solution I'm imagining for this is what the Double Field module sounds like it does (though I cannot be certain since I have never used it). If this module would be able to do it, you'd want a field with taxonomy with a Date field to select the stop and time of that stop (and then be able to have multiple values for this field so you can select multiple stops and their times).

Otherwise, you could use Taxonomy if the trains have set times that they arrive (like they always arrive on the hour, quarter after, etc.). Otherwise, yeah, it wouldn't be realistic to use that if they can arrive at 12:53, 3:38 - if any time is possible.