Bro, Do you mean that there should be regional Rly HQs under which Zonal HQs should function?
By the way, the process of publishing 5 regional Time table (E-(EC,E,NF),W-(W,C,NW,WC),N(N,NC,NE),S(S,SC,SW),S E-(SE,SECR,ECoR)) is not a process of bifurcation, but a process of integration of 16 zones into just 5 zonal timetables, where zones were integrated so that the number of zonal timetables instead of becoming 16 from earlier number of 9, have been reduced to just 5.