I'm creating some scenarios for the North Wales route. I thought it would be a nice idea to do the following - make an AI "template" scenario I can use as a base for half a dozen or more player scenarios, so I do the AI once, then I can make a number of different scenarios for the player. The template scenario is made using the current Network Rail working timetable (using about a 2.5 hour slice), so the trains seen are what you would see if you were actually on the route at that time of day. I'm having a problem outside Chester station though. It seems that any AI express passenger train waiting at the station blocks the approaches into Chester. For example, the Euston to Chester service that stops in Chester for a while, then leaves in the other direction. While it's stopped it seems to cause all the signals approaching Chester from the east to be set at danger, even though it might not be moving for another 15 minutes. This stops both other AI trains and the player train entering. Playing with the priorites just moves the problem, a bit like pushing down a bubble in wallpaper. Is there any solution to this? I suspect the AI is trying to path the train even though it won't move for a while, and because it got there first the whole station is blocked until it leaves. Can a script be written to make the train go 'inactive' during its dwell time in the station (essentially become static scenery)? Or am I just barking up the wrong tree, and will have to concede I'll have to do custom AI for every single scenario (e.g. one solution for a single scenario would be to see what trains are stopped in the station when the player passes, and add them as a static consist instead, and have the only moving AI trains be the ones that players are going to definitely be affecting the player train - but this involves a lot of extra work compared to making a base scenario and cloning it half a dozen times - especially if you're trying to base the AI off the real Working Timetable).