@Dipyaman Basu*: Re# 97391-21
Start Station: A
Destination Station: B
Station C: Sharing GEN Quota along with A (eg. NDLS [A] & GZB[C])
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Station...
more... X: If Individual Remote Quota exist
RSWL: For WL from A to X
RLWL: For WL from X to B (or station between X-B)
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Station Y: Big Station, with nearby small station (Group P) sharing Quota of Y
PQWL: For WL from A/C to Y/Group P
PS: Individual Quota of Station Y can be Remote or GEN & PQ is created for all such combination of Stations as like Station Y (& clubbed as single PQ Quota for entire train's route)
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Station Z: Intermediate station having high GEN Quota from A
eg. NJP or HWH for Guwahati bound train
RLGN: For WL from Z to B or in between station (Z-B)
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PS: These WL are generally provided, when GNWL/RLGN exhausts or when RL/RS/PQ-WL is too low as compared to GNWL/RLGN. There isnt any set rule of provision of WL. RSWL/PQWL can start before GNWL getting exhausted or RLWL can start before RLGN getting exhausted.
eg.
DBRT Rajdhani (2423)
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NDLS-CNB (Remote Quota of CNB-RS): X
CNB-GHY (Remote Quota of CNB-RL):Y
CNB-DBRT (Remote Quota of CNB-RL): Z
X=Y+Z
But WL can gp criss-cross even for NDLS-CNB getting GNWL & CNB-GHY/DBRT getting RLGN!