Size: 442x442, Spacing: 6 tiles, Train length: 6 cars, 8 lanes
I don't know any practical use case of my intersection but it should have enough throughput for any use.
I used a testbench posted by hansjoachim on the factorio forums. I couldn¨t be bothered to measure twice because i currently only have a potato computer available.
S1: 298, S2: 252, S3: 167
Designed by Hovedgade