Most megabases I've seen has multiple train lines running same direction parallel.
Sometimes implemented so trains can change to another parallel line if first choice is occupied, that way allowing new trains to enter from a substation.

If trains on main line now has a priority they may reserve the ...

set up leave condition like Copper Ore < 10000 or whatever.
This will effectively stop trains from moving invane and they will just sit on the stacker until resources are required.

What will happen if all his trains has less than
Copper Ore < 10000 or whatever.
Will all his trains then just sit ...

I can only imagine someone has already designed it, but I can't find it here, on Reddit or anywhere else. If someone can help me, it would be much appreciated :-)

What I want is a switch for multiple furnace arrays of 70 electric furnaces, loading to an express belt.

1: If no Iron Ore is coming in ...

I have already tryed to search, so no need for LMGTFY.

I have started a game with the aim of getting 1RPM without logistic robots, no solar, no active/provider chests AND no modules.

What exactly do I need of each kind of product, beside of oil? (Oil I intend to simply extend till needs are ...