As clam1952 mentioned, ditch the open email address. If Trainers need to contact you, they can easily do so via your Trainz profile.
That's a mighty long shopping list. Good to know what you ultimately need for your route. Most should be pretty easy to make. Once you've done one, it's then a matter of making a copy and just doing the required modifications. Some like the 10 track crossing and the 8 lane crossing might be a problem. I seem to recall having difficulty getting trainz to control these wide crossing using the built-in kind mocrossing. Once some of the elements were beyond a certain distance from the center-line, they didn't respond to the control commands anymore. That was back in 2004, perhaps that has been resolved since then, I haven't tested it recently.
Roads and associated intersections are fun to make. Once you start, adding another variation to the set is relatively easy. Unless you are planning to have a seamless integration with existing roads, you don't have to worry too much about them joining correctly with other sets. If need be, a few transition pieces can be made to cover those cases. Five and 6 way intersection are no harder than 3 or 4 way types. As in all object creation, the texture is what will make or break the object. Being in the neighborhood, you have direct access to the real thing. Digital cameras are a great way to build up a library of appropriate textures.
I was in Chicago for a week last fall, admiring the architecture and your famous and fabulous L. Is that what you're working on? Hope to see a few screen shots when you're ready.
