A northbound train的用法和样例：
- as the man was riding a northbound train to a small village in upstate New York,
- Island platform design is adopted in most stations of new extenstions to facilitate passengers to board southbound or northbound trains at the same platform.
- A northbound interface is an interface that conceptualizes lower level details. It interfaces to higher level layers and is normally drawn at the top of an architectural overview.
- I haven't got a clue about the train schedule.