Adding a second level to my current layout

Just do a ELL or BART type level loop over the buildings and switches between the loops.

The supports can be pillars or N legs high enough to clear what ever you do not want to move out of the way.

031 or 036 curves should work in that space.

"EL"

 "BART"

El is an elevated train like in Chicago and Bart is like the elevated parts of the Bay Area Rapid Transit in San Francisco. Check this video:

http://www.youtube.com/watch?v=y3Nh_4gIWhA

I like the simplicity of your layout.  I tend to get things too complicated, like double reverses and that sort of thing.  I don't even have my rebuild completed, and I'm already planning an elevated loop.  In order to keep it simple and not to interconnect to my basic complicated layout, I'm just planning on an elevated oval loop over the town part of my town and country layout.  I would upload my SCARM plan, but every time I do, all that uploads is the parts list.  It might be interesting to have the elevated portion at varying heights - like at the lowest point 1/2" above basic, and graduating heights up to 5" for crossovers.  Just a few embryonic thoughts.

Bob, upload your SCARM file. I believe all we have to do is download it and change the file extension from .txt to .scarm to get SCARM to display it properly. Didn't we go through this in another thread a couple of weeks or so ago?

Yes, we went through this before.  In order for the other members to see it, they will have to convert it from .txt to .scarm, and all don't know how to do that.  But, here goes.  The center portion is the elevated unconnected oval which requires a crossover.

That was the wrong one.  When I said crossover, I meant duckunder.  Same thing.

What's interesting is that when I do a Save As, the first one comes up with a .txt extension, so I had to change it, while the second comes up with the .scarm extension and I didn't need to change it.

Anyway, as far as the design goes, I see what you mean, but smaller layouts always seem to get complicated when one tries to work in 2 reversing loops and some operating action.