Long Wait For The Train

I've been waiting for the train for 20 minutes and still no train has arrived

How do I know when the train will come?

 

The paper timetable

 

not in the station

 

It looks like it is 3:45 am in your screenshot! If that is the case, then probably a long time.

 

https://smtimetables.herokuapp.com/

This website has timetables for every route in the game bar Cathcart (hope they'll be adding it soon). As theorganist says, there won't be much at 3.45am.