Rail intersection problem

https://preview.redd.it/ke71uytc31hf1.png?width=1920&format=png&auto=webp&s=fbb28203769e4be9a0970ca4bf6fda522a1f1405

i cant seem to figure out this intersection blueprint (trains are a nightmare). trains cant go into the intersection at all.

(sorry if i have bad english, not my first language + tired)