I started with some simple train station setup in the base with two small 4 wagon train stations with waiting lines per 32x32 chunk that lead out to a line to get out of the station area.
Once I noticed that a single rail spacing between two rails would not work well outside the base for placing roboports at walls, i rebuilt the network to have two rails spacing between rails. Unfortunately now I can't place a signal where there was one before, despite there is two tiles space that could hold a rail signal (two chests fit there) and as for my experience so far signals can also be rotated to clarify which rail they would be for, so I think I should be able to place one there, as there is room and it could even be rotated to say which rail it should be for if the system for some reason doesn't understand which.
I am aware that the right one already was missing room for another signal for efficiency and hence was bad, but now it's even worse on the left one and I'd need to rebuild the whole station design
