I like very much to play this game. From the begining i observed it meant to be very realistic. If so, then i would like to see all kind of crossovers that exist in real world. For example http://www.bronx-terminal.com/?p=342
This has been brought up quite a few times… I hope they add the ability to do more than just a simple junction that we have now.. it leads to unrealistic track layouts requiring much more space than would usually be required for rail.