You can optimize the east and west going exiting rail signals by replacing the chain signals with them, otherwise it should run good.

Afternote, i think it's not vertically symmetric. Try placing the blueprint over itself after rotating it 180 degrees.

Ye I know, I posted it on reddit, and ...

4 Way 2 Lane Unbuffered intersection.

It uses LHD on the vertical axis and RHD on the horizontal axis

I know, it's cursed

It should have a pretty decent throughput tho.

https://i.redd.it/n36c9hxublb91.png
Blueprint:
0eNqtmm9PGzEMxr9LXpfp8sdx0q8yoYnBaZwEB2rLNIT63dfScqPgI/bTSbwpcL86jh37nvjF ...