How to make func_tracktrain not run constantly.

[keen fable]

in the path track where you want the train to stop set an out then to start it moving again set an output to start forwrad with a time delay of your choice like in this pic

to make the train loop the track set the next path track to the 1st , or set an output for the train to move in reverse when it reaches the last path track with a small delay if you want it