Well halts in NR territory might be revealed later with NR press release but yes it will be interesting to see how NR runs these trains especially considering LKO-CNB section is already over saturated.
Yes, R means reversal at Phaphamau Jn , ON-UCR section is going to witness so many trains and this is coming when there was two train derailment attempts in past two days in that section, hopefully they have improved security now.
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NER has also cancelled some trains at the same time but haven't officially released PR, I guess it has to do something with Jhusi-Prayagraj Jn doubling, if you do find any info do share with me