KR is a route passing through Forest and Mountains, Tunnels etc. Double Decker Train is double times bigger than normal coach so may be Mumbai Karmali AC exp discussed as DD by people will run for test with DD coach for almost 1 year.
Test run ke liye one run is enough, not a whole year is needed.. Else plan would be this, run DD everyday Except Thursdays and run this AC Exp on Thursdays..
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