After building all the outposts for my LTN network I decided to create a one-way bus system for my rail network. The two outer lanes are for incoming traffic while the inner two lanes are for exporting the trains out of the bus. This way there are just a few crossings to keep the flow of traffic going.
The lanes are named Bus Line 1, Bus Line 2 and Bus Line 3. The direction of this blueprint is from South (Line 1) to North (2 is mid, 3 is end). My initial intention was to place the three LTN Smelters (copper, steel and iron) at the Western side. The three circuit outposts are placed at the East.
For completion sake I've placed the six outposts, which are compatible for 1-4 trains, in this BP book. The smelter outposts are inverted, as they are LHD. The rest of the bus are RHD.
I sincerely hope this design, which I'm very proud of, will be received warmly by the fantastic Factorio community. And please take your time to take a look at my other LTN outposts in my account. You can find the three smelters in RHD there.