ok i got it, thx to all , wasnt hard, the arrows apearing while building tehm led me to think that was the area covered by the signal(wrong). Signals divide railways into blocks, 2way or one way depending on if ur using one or two signals to divide the blocks. Blocks guarantee that just one train wi...

Been playing for like 50-60 hours now, wanna make use of them so that: i have a common section of railway for both the trains (iron/coal). loops: no. two-way railway: yes. SOME PICTURES: Here's where the trains paths join(coal comes from the left, iron comes from the bottom and theyre destination to...