- It's quite small. Not convoluted, no bells and whistles nobody needs. Just the essentials and basics for everyday use: rails, signals, and big power poles for energy distribution.
- RHD (right hand drive - the signals are on the outside.
- grid size 60, because it uses the maximum range of the big power pole as grid basis.
- contains landfill to build comfortably over water.
- contains 1-lane exits to ease manually connecting small remote sites such as ore mines with a bidirectional single track. More easy than to connect 2-lane sites.
- has been developed and signaling refined during the build of a 9.8kspm megabase
- works for many train lengths, with 1-1 up to but not limited to 2-8.
Blueprint book:
https://factoriobin.com/post/9UxmvzEq
The map where this blueprint book was developed. If you zoom in, you will see the 1-rail connections of the ore mines. The super-grid size is arbitrary and has nothing to do with any city block concept. It's just to get rail coverage everywhere to connect the mines.