The BG track with loop,closest to the wall comes together and then crosses over the SG tracks Its a difficult proposition in HO scale, and I could not duplicate the prototype track plan.
Platform road closest to camera crosses the BG then passes through a crossover. Straight ahead is the loop to the right is the main line to Sydney. The through road runs over the BG track to form the main line beyond the crossover.
RH large radius, will hopefully allow the Aurora and Daylight cars to cross over.
The through road crosses over to the runaround road. The picture shows me that I have forgotten to include a point to access the Loco and yard.
So the first diamond will need to enter a RH point to acess the yard.
Some more green valences .......
Cheers
Rod