Before I continue working with this map, there is a big hurdle ahead that I want to plan before dealing with it. In Denmark, all long distance routes are connected somehow with trains splitting and coupling in many different places, leaving pretty much all of Denmark with a direct train to Copenhagen at some point. The problem is that they all connect to the same 2-3 hourly trains which then have different destinations throughout the day in addition to its usual destination (i.e. Copenhagen - Århus/Ålborg). See the map below, I am talking about all yellow and red lines being interconnected (disregard the one going to Sweden).

My problem has several parts:
- I have alarms turned on for missed departures from a Timing Point to catch problems early. This means I can't do gradual increase in service day by day, I have to add all trains to all lines at once (that's ~70 departures from Copenhagen and back), each with slightly different destinations and train consists.
- Some regional lines (green) are connected to the InterCity lines at night, but not during the day, further complicating matters.
- The same number of train cars have to go east and west, so all ~70 departures have to be balanced with the right number of cars at the right time
- Coupling and decoupling: How much testing is needed to make it 100% working correctly?
What I am most afraid of is having problems right when I start all the trains. How do you do it? What tips do you have? Maybe I should have fiddle yards to do partial implementations first? Or cross my fingers? Please help
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Reading about InterCity on wikipedia in
English, more detailed in
Danish or the concept briefly in
German.