"Attached-track" container
From TrainzOnline
Auto-generated spline track. Generated through attachment points located within the default mesh. Attached-tracks update automatically to the spline track connected to it in Surveyor. You may over-ride this auto-update feature by adding useadjoiningtracktype 0 (see below).
Note: Correct track end attachment orientation is essential. The Y axis must point ‘out’ at the correct angle. The Z axis must point ‘up’.
The Attached Track Container has the following tags and containers:
track
Kuid of the track to be used.
useadjoiningtracktype
Indicates whether the track type should change to match that of the first track joined to the object.
vertex
Attachment points at which to place track.