I have a 7x16 layout that's similar to yours.0-72 on the outside 0-60 just inside that and that inside has the yard there as well but mine is a u shaped loop instead of just one way into the yard.
On the town end I have a tunnel that covers both outside loops and this let me incorporate a figure 8 above the 2 loops. I call my local route. You can tie it into your yard track by making a crossover from the figure 8 to the yard track.
I also elevated the town so that end of the figure 8 has a station .This lets me run 3 different trains on 3 different loops at the same time .or one train with full run of the layout.
I don't have that "L" shape right now but I want a turntable later so it's in the works.
David
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