So I started to read more, and you're right. I spend a lot of time reading to what the union members said. E.g.: https://www.vice.com/en/article/qjkzbq/28-fre

So I started to read more, and you're right. I spend a lot of time reading to what the union members said. E.g.: https://www.vice.com/en/article/qjkzbq/28-freight-rail-workers-tell-us-what-they-want-you-to-know-about-their-lives#:~:text=All%20of%20it%20on%2Dcall%2C%2024%20hours%20a%20day https://www.vice.com/en/article/qjkzbq/28-freight-rail-worke.... That sentence doesn't match with the idea of a fixed schedule. A fixed schedule doesn't require you to be on-call, because you know when the train will leave. I'm confused now.