@Pasi: thanks. It works! Not very intuitive for me, though…
You say that some, if not all, the points I’ve stated are solved by mods… I guess that those mods are programmed by the community, not the developers, aren’t they? And if so, what’s the merit of C:S’s developers over TF’s ones? The former get their job done for free, don’t they?
Incidentally, is there a mod for road tunnels? Or for linking metro with trains? If so, please tell where to find it…