Trains 17317/8 UBL--LTT , 17319/20 UBL--SC, 17225/6 UBL--BZA have the same CC. and if u see the timings at UBL it is like below.
17318/7 - Arr 3:00 Dep 15:45 (Primary maintanence under taken)
17320/19 - Arr 7:30 Dep 20:50 (Primary maintanence under taken)
17225/6 - Arr 11:20 Dep 13:30 (Secondary maintanence under taken)
Distance...
more... covered by all these trains are in range of 600-700 kms and are more or less ONT trains with run time of around 15 hrs in single direction.
RSA can be comfortably established between these trains or any 2 of these 3 trains and advantages will be as follow:
RSA btwn 17317/8 and 17319/20
1 rake each day will be maintained in place of 2 rakes as of now, leaving scope for new trains from UBL.
RSA btwn 17317/8 and 17225/6
Amaravati shall be handed over to SWR and rake movement would be like UBL-BZA-UBL-LTT-UBL (undergoes Primary Maintanece)
This leaves further scope of extension of amaravati to Vizag (helps in improvement of connectivity to UBL/HPT/BAY/GTL/DHNE to VSKP)
RSA btwn 17319/20 and 17225/6
Amaravati shall be handed over to SWR and rake movement would be like UBL-SC-UBL-BZA-UBL. (undergoes Primary Maintanece)
Advantage same as above.
these can be the scenarios without any change in timings/reservation quotas of any service.