This is really not my idea but I saw it on an N gauge layout at a show.
My layout is not very big, so I am trying to make it as interesting as
possible. The 2 tracks are the same main line. enter from the right,
loop around and come back. Instead of 2 parallel curves, why not
a crossover. It adds some interest and gives me a larger corner
for scenery.
I'm very happy with this and thought I'd share.