Hi Tom,
I modified Jan's rendition to correct a software error (in all model rr software) for the length of the O31 switches. They were announced and marketed at 10" in length, but are actually 11 3/8" long when manufactured. The corrections are not yet in the software, so a 1 3/8" was added to compensate.
I reworked the track plan for fitment with the switch corrections and to get a longer length for the passing siding. It can hold a 20" engine and about 4 -13" cars now.
I have marked the centerline at 40". Removing the screws from a few adjoining tracks on either side of the light blue tracks would allow you to remove them to separate or fold the 40" x 64" sections. You could also cut the tracks with fine blade hacksaw on a 45° angle at the centerline for folding. Folding in would require the same motion. Folding away from the center wouldn't matter.
Notes are added for pertinent information. I have printed the track plan and inventory list in .pdf. Here's the track plan in a .jpg for your review.
Any questions, post them. Merry Christmas!