I know Zombeloffe has a tracktrain example in the vault. (Been there for 5 years now) But i have not seen a tracktrain example with different track paths.
Ride the train around the first loop, get the gun, on the second pass around, shoot the switch to change track paths and go around the second loop.
It's very simple to achieve.
At the path_track you would like to split, enter the name of the first path_track of the second track in the "Branch Path" box. Have the button trigger the PATH_TRACK with the "branch_path" field filled in.
For example: (As done in the map) Path one: tram_2 > tram_3 > tram_4 (split)> tram_5 > tram_6 Path two: tram_2 > tram_3 > tram_4 (split)> tram_5a > tram_6a