Modeling a Model Railroad - Looking at the Layers

With the main elements in place (the creek and the viaduct). I want to take a look at the skyline. I have to do this in layers first the back row, which contains the majority of the freight car spots, and the front row (which contains fewer car spots). Right now I'm only concerned with the heights of the actual models, I'll deal with the backdrop later.

First from the left side; the creek module. I want to keep the buildings tall near the creek, to increase the vertical element. The discussion would be around the building on the right side of the creek being right up against the bank or allow spacing for an alley or narrow two lane road (leaning towards space for a road my self).

Then to the viaduct side (note that the viaduct will not be nearly as massive looking as it looks like here). Again tall buildings around the viaduct to enhance the vertical element. I really like the angled industry back in the right hand corner.

And a look at the whole.

Then its time to take a look at the foreground buildings.

Creek module again. Buildings are shorter to give some visibility to the buildings in the back. For operations, I intend to make these buildings removable with foreground car spots marked some how.

On the Viaduct Module things are much the same with the front right corner being a team track in an empty lot.

And another look at the whole. Being able to remove the foreground buildings will make operations easier and provide more interesting camera angles.