Now i get why you wanted to ask me the technicalities.
Thankfully, u moved from 30-45 to 25-30 minutes (however 25-30 minutes too do have 10 minutes difference)!!
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But my question is still the same.
If...
more... a train takes 'n' minutes for loco reversal, why don't we have a stoppage of 'n' minutes at that station, as simple as that.
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After that slight slack can be provided to cover up. That's it. What's the big deal?