How about reading stuff aroudn here? Dont be lazy.
That would give more confusions than answers I'm afraid...
Transport Empire is a project aimed to create the best transport game in the world
As for the software itself, it's in very early alpha stage - only terrain, vegetation and weather are implemented so far.
As for the game's design, IMHO nobody knows for sure. The only certain thing is that it'll be 3D. The project has been around for a long time and a lot of effort was made to give it a good design - but I don't think much of it is still actual. Uzurpator, the lead coder, declared the "pioneer law" - the first functional solution is allways accepted.
Be sure to check out http://www.transportempire.com
- there you'll find most of the interesting info, like screenshots and downloads. Note that the "Ott3d" branch, which the page also presents, is now discontinued.