I added the Kato v2 set to my collection. The viaduct track comes with elevated piers in various heights. Alone, the v2 set can create a rectangle track with one side elevated high enough to run a second track under it. The v2 set comes with one single lane bridge. I already had one of these bridges, so used both in this layout. A year ago, I purchased two sets of piers to try them without the viaduct track. They were not designed for that purpose and I started using Legos for my piers. The Kato piers make the layout look much more authentic.
There are three separate tracks for trains. The red line uses the viaduct track and passes over the other tracks. There are three storage turnouts and a reverse loop. The double curves are from an assortment of variation sets including v11, v14 and v16.
This is a fun layout, but the storage turnouts are too short to store long trains. As long as you are resigned for trains with only four or five cars, all will be great.
SCARM file is available here.