- parks in cities
It would be interesting - but I am worried about that variety of parks is very limited and most people don't control towns so much.
- huge crossing of tracks
This had been used in some ways - but as part of else topics
- airports and their layout
Airports had already been used - in June of 2010 (and I think that it is too early after previous using)
- traffic jams on streets, tracks and in the air
Jams on streets had already been used - in February of 2011.
But jams on tracks had not been used - but I am not sure with jams in the air.
- very complex stations
Yes, I support it - stations had already been used some times - but not in this way.
you can see history of SMSC.