So, here is the problem. I got several oil fields, delivering crude oil to a fuel powered plant. However, i have tracks also leading to a refinery and some of my oil well are also connected t that. So what happens is part f the fuel that ends up in the power station is transferred back to the oil well and it moves to the refinery from there, which is annoying. Is there any way to tell my stupid trains to consider the station as an end station and not a transfer one? Or to make it so the oil can;t be picked up? Because now, some trains just take the oil back and forth.