When the train enters a certain dead end station, the loco gets detached from the front n takes a loop, goes back n then gets attached back to the train. this is called Loco/Rake reversal. this is the original process which was followed before.
Now
When the train enters a certain dead end station, the loco gets detached from the front as usual, but this time this loco won't go back, instead there will b another loco which will come the siding n attach back to the train. the early loco will take...
more... back to the siding n rest.
this process is also called the loco/rake reversal.