I'm not sure what your operating plan is, but with a slight revision, you could have a turning loop, and with a further slight revision, another, so that you could reverse trains moving in either direction.
The first minor change would be to extend the line with the two dead-end sidings so that it joins with the inner main line (in the area where you have what appears to be a passing siding). You could still retain the two sidings. This would reverse the train, allowing it to run back into staging, rather than backing in.
The other minor change would be to include a switch off the inner loop, right near the upper edge where the extension joins the larger part of the layout. That track could then cross the track that presently leads to the two dead-end sidings, and then rejoin the mainline at a point between the passing siding and the place where the track from staging joins the inner loop. This would give you a second place to reverse a train, either to undo a reverse done on the first loop, or as an additional option. Because neither of these changes removes any of the other track, you wouldn't have to use these turning loops unless you needed to. The reason I would opt for two is that my very first layout, which was basically an oval with a small yard in the centre, had an elevated track around the outer perimeter that allowed me to turn a train, but I was unable to turn it back to its original direction unless I backed it around the loop. A second loop, added latter, provided this option, which made operations much more versatile.
Wayne
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