the other two trains aren't moving and they should be moving on scenario and the signal isn't yellow or green and i can't go pass it or will the scenario
...not sure if this is the same issue you’re running into, but you might want to check out the following link and see if it is. There’s also another link in that thread that has more info on this issue... I’d check that link out as well. https://forums.dovetailgames.com/threads/class-31-cement-circle-scenario.23961/#post-147797
It's been a huge sticking point for a while, especially since there's an achievement attached to its completion.