Lebovitz Central RR project

This is a project layou that I am building for a client. It is a 6'x12' table with the Lionel Fastrack system. These are pictures from the third day of reconstruction.
I spent the first couple hours of the day building a viaduct for the raised city. When I got to the layout, I plastered the mountain using Plaster of Paris with some concrete dye added to make a lmedium grey. Later in the day I test fir the viaduct into position. For the reatining wall I'm using textures found on CGtextures.com, to speed up the process. I'll be using some other street textures to simulate the road system.
It's starting to come together now.