Charlie is modeling the SP coast line from Santa Barbara to Guadalupe, with the Lompoc branch, circa 1964. This is a very impressive layout. The design is very simple yet it works very well. The layout is a two level layout with a double track helix at each end. The lower deck is the staging area and storage yards.
Starting by coming off the up track on one of the helixes, you travel through the upper scene. When you reach the other end you enter the down track of the other helix and drop out of the scene. Once on the lower level you there are two through tracks, one for each direction of travel. You can either travel around the room to the other helix, back up and onto the scene again, or head into a storage track. There are also two balloons, one under each helix, to turn trains.
He is running a pure DCC layout. It makes the operation so easy. He has a UR91 and radio throttles. No cords to trip over, just trains to run. He is also making all the signals operational. They are controlled by the turnouts on either side of a siding. The control information cascades down the line to turn signals yellow and red or green.
This is a very well thought out and well planned layout.