A lot of nobles received the same invitation from Noel, stating that he wanted to hold a conference between lords to discuss how to develop the northern territories.
Of course, there would be some conflicts on a smaller scale even among Noel's allies, but he had specifically mentioned that everything would be discussed together.
In other words, it wouldn't just be Noel who decided it.
Because everyone needed the train that had been confirmed for its safety and function, Noel had specifically stated that all the lords invited would be the priority to get access to the train.
No amount of money or politics would be able to influence Noel to change his decision. It could be said that if they ended up bringing their conflict to this conference, Noel would classify them as someone who didn't need trains. He would simply not build a road over there, which would make other territories more prosperous.