Dave, I like the idea of the crossovers, but the purple goes right into the side of the mountain. Also if you look at the loop in the oil field depending what way you enter you can reverse either direction.
Yes, but the shape of the mountain could be changed. The point is you need the 2nd crossover somewhere and IMHO, there were too many switches along the bottom when I put it there.
As far as reversing goes, you can't reverse when entering the loop from the left unless you back through the wye, at least in the version I've been working with. There is nothing wrong with that, but my next suggestion was going to be along the lines of what Carl just posted, adding another wye on the left side of the circle.
And looking at his version now with the full door and bridge, I see why he located the yard where he did even though the location limits its size. I hadn't seen his original until late last night, so I missed that you moved the yard to the bottom. I also missed that it is an around the room layout and moving it creates an access problem because it will be difficult to reach the cars and tracks in the yard for fixing derailments and maintenance. Any depth over 30" is problematic and should be avoided.
Carl's new version doesn't have either crossover (not sure why), so there is no way to move between ovals, but they can easily be added on either side of the door/bridge. I'm not sure what the lone switch is to the left of the bridge, so I took it out. He also had a GarGraves track on the left that I replaced with ScaleTrax sectional pieces, though if I were building this, I'd replace as many multiple small pieces as possible with single cut longer pieces. I added a crossover on both sides of the bridge and if you want more storage, it would be easy to replicate the yard on the right side of the bridge.
One problem I see in this version is the lack of buildings, so you will have to make adjustments to fit whatever buildings you plan to add. That might be why you moved the yard in the first place, but you do need to consider your ability to reach things.