All trains will enter PF#1, if any train is occupying PF#1 then only the other train goes on PF#2.
If PF#1 is vacant train will go on PF#1.
Only exceptions on KR route are Madgaon, Ratnagiri, Chiplun, on these stations if PF#1 is empty then the train is allowed to go on PF#2..
Else on every station on KR train will take PF#1..