Sry dude but I came here to bash this guide because the design for the passing loop proposed here is actually bad as it can lead to grid lock with 4 or more trains on the line.
How is the grid lock possible? Consider situation like this:
http://steamcommunity.com/sharedfiles/filedetails/?id=305167096
How it should be done properly? Like here:
http://steamcommunity.com/sharedfiles/filedetails/?id=305167731
This way a train won’t be able to enter single line if there is a train going in the same direction ahead of it.
