Pls, help to little train :)

[Ducker]

Hi. Pls, help a little train find way to home .
I have 2 train :
- red, from station C to B
- blue, from station C to A
My railroad strange, but i have to understand rail signal logic. I read guide (for example https://www.reddit.com/r/factorio/comme ... ts_23_and/), but have trouble with this config. As you can see all signal from C to B are green, but i got "no path".
If red train on station B, blue have to wait him.

[Mehve]

As shown, the rail leading into stop B is one-way. Put a rail signal opposite the existing one, just left of the merge, to tell the system that it's okay to go both ways on that block of track.

[Deadly-Bagel]

To diagnose these sort of issues, get in the train and try to drive it to the destination. If there is ever a signal on the left (from the train's perspective) where there is not also a signal on the right, you're violating a one-way track.