There are three trains (Train 1111, Train 2222 and Train 3333) are coupled together and depart from station A to station B. Upon arrival at station B, these trains uncouple, with Train 1111 continuing its journey to station C, Train 2222 traveling to station D and Train 3333 traveling to station E. In this scenario, how should the train routes be created?

The principles of implementing train coupling and sharing in FBS are the following:

• There is only one train in the section A-B from an operational view, so there is also only one train A-B in FBS. (In opposition to that operational view, the travellers may regard it as three trains in that section running at the same time.)
• The one operational train A-B contains three train parts A-B. Each train part will continue from B to C/D/E as a separated train.
• The program will link the trough-running of the three train parts A-B to the final destinations C/D/E by the same train part number. So, the train part A-B which goes through to C must have the same train part number in the section A-B as well as in the section B-C and so on.
• Usually, the operational train runs through from B to the final destination with the first train part (the train part which is in front of the combined train at B). So, if the first (in-front) train part leaves B to E, the operational train also runs A-B-E, from A to B with three, from B to E with only one train part. This is optional; there is no need to have a through operational train; there could be three new operational trains starting at B.

More Information on this topic and some detailed examples you can find in the document:

Train coupling & sharing in FBS - Examples