The timetable for the line closures are not implemented yet, due to 2 main reasons:
-First, line 7 isn't finished yet -> I have to redo the timetable not only just for the main timetable but also for every line closure timetable (would cost a huge amount of time).
-Second, the underground section at the main station isn't built due to the fact that tunnels can't be build at the moment -> I have to redo the paths at the main stations for most tram lines.
Maybe, after I'll finished line 7 to Nordstadt, I will implement one line closure to the ingame timetable. At the moment you have (only) the PIS-Routes for the line closures with the special announcements:
Route 50+ -> see line network "Bauarbeiten Innenstadt Zentral"
Route 60+ -> see line network "Umleitung Pfingstferien"
Route 70+ -> see line network "Umleitungsplan Sommerferien"