I am planning a modular switching layout which will have two boards, each to be 1'6" x 3'. I have built foam board railroads before but never really got beyond the "I have got some track down - let's run trains" point. I hope to do better this time so I have been thinking about ground cover etc. 

Hopefully the above picture got your attention! Getting to the age where 'going under the layout' is no longer an option I came up with the solution shown below. After removing rolling stock it takes only a few minutes to flip to vertical, that includes roling out the racks stored under the layout. In updates to follow I will post additional photos of details and progress to my N Scale Mooers Junction Railroad.

Hi guys,

We will be following along the progress of the two helices for my N scale ARZC.  The helices are each 18" radii with Atlas code 80 track nailed to 3/8" plywood.  Each turn of the helix will be constructed with 8 chords of the 3/8" plywood, each chord will be joined by a biscuit and then 2" tall blocks will create the space between levels.  One helix is 6.5 turns next to the classification yard and the other is 5 turns in the corner where the branchline starts.  The branchline will be on 0.25 turns of the second helix, above the mainline.