I have two suggestions:
Why not have a train limit of one as the default?

Most here will probably disagree, but im more and more getting the feeling that youre making the game too convinient funnily enough :lol:
Im not a gamedev myself, but what ive heared and i agree with is that games need ...

Just a little piece of opensource-stuff i want to share for your world generation:

Website with dokumentation (althrough it seems the dokumentation seems to be written for an older version) accidentalnoise.sourceforge.net
Download -> sourceforge.net/projects/accidentalnoise/?source=navbar

Thats a ...