Hi there
Mate, I am well impressed with this. Just goes to show how you can make a limited space really work as a layout. I kinda like that I know there's loads of stuff going on 'behind the scenes' but then that's what it's all about, isn't it...letting the imagination go

And all in 'N': I seriously thought it was '00' until I paid proper attention to the title
I'm with Hairy on the crossings: I find most footpath crossings are simply planks of wood layed parallel to the lines. There are some good examples on the forum to get inspiration from. Most people seem to just make them out of scrap balsa or matches or whatever comes to hand and paint them up and weather them appropriately. Might be a good idea to knock up a 'WARNING: TRAINS CROSSING' sign or somat to go with it too
Cheers fella, like this a lot. Look forward to the next steps!
Tim