Only constraint in building this was that it had to be 3x3 chunks (so 96x96 tiles). 180-degree rotationally symmetric. Prioritises straight-through traffic, with the inner lanes being straight-through exclusive. Bottleneck is the turning lanes and merging, by design of course. Power poles were just to help with grid alignment and don't serve any functional purpose.
04-02-2026, 22-03-04.png (1.14 MiB) Viewed 1686 times
Re: 3 and 4 way intersections
Posted: Thu Apr 02, 2026 11:19 am
by leftofzen
This turbine design is rotationally symmetric in a 3x3 chunk space, with the 'downside' that not all lanes can go in all directions and there is no turnaround. 90-degree rotationally symmetric. However, throughput is good and I usually build this in my maps with a separate lane-changer on the entrances/exits to this intersection.
04-02-2026, 22-18-08.png (1022.03 KiB) Viewed 1677 times
Re: 3 and 4 way intersections
Posted: Fri Apr 24, 2026 3:55 pm
by Oliverfactorio
Skärmbild 2026-04-24 175031.png (1.3 MiB) Viewed 1260 times
Not sure if diagonals are welcome but here is a diagonal crossing converted to straight rail to work with the tool.
Re: 3 and 4 way intersections
Posted: Wed May 27, 2026 8:41 pm
by Factoriointersection
Hey, So I know I havent updated the thread, but I have a new plan. Now I have added all the new intersections that follow the criteria's but not on the forum but rather into the mod. That way you get proper filtering and not this messy forum list.
Check out the updated Testbench. Press the "i" icon and check Global runs. I do plan on making a standalone mod you can use in your normal savefile.
So if you want to submit more intersection now its open again=)
The intersection I excluded either had no BP, too many signals, deadlocked or wasn't a proper 4 or 3 way.
Im quite suprised that nobody else has done this yet. This is the most compact "simple" 4-way intersecion that I think is possible. It uses mostly the same zone blocks as other designs, just in a smaller 30x30 footprint.
Starficz wrote: Sat Jun 20, 2026 8:06 pm
Im quite suprised that nobody else has done this yet. This is the most compact "simple" 4-way intersecion that I think is possible. It uses mostly the same zone blocks as other designs, just in a smaller 30x30 footprint.
Great=)
It will be in the next update to the mod. There seem to have been a bug with testing so the score will be different
