I don't know if this bug is one in a million but you can clearly see I had a yellow. This was timetable 21T Harrisburg-KC (Intermodal) https://www.xbox.com/play/media/MSNMUTEAXP
This is an issue I've seen a couple of times myself arriving at Johnstown. An AI train stops at the usual spot on the eastern side of the yard but for some reason does not move on, then other trains back up nose to tail behind it. I've seen trains entering the map from the west terminus of the route getting backed up nose to tail the same way. So something is intermittently interfering with the AI's ability to traverse Johnstown yard. DW
It was a saved and I went back to it. The train finally moved. During my replay I noticed the aspect showed red even though the HUD showed yellow
I did the same thing once. I sat and waited behind the backed up trains for 20 minutes or so but nothing would move, as a last resort I saved and reloaded and that got them moving. Its funny cause normally saved games cause issues but in this case it fixed something. DW