I request IR to provide wap7/wap4/wap5/wdp4 to all trains with 22 coaches or more in NCR
because even if one train has just slightly underpowered loco then also that can have huge effects on punctuality of others ...
WDM 3a / wam4/wap1 is strict no no for trains more than 21 coach ... It will waste atleast 8 minutes on every stop ..