Bhai,
LTT se KYN Tak 2 Bade crossovers hai.....1st at LTT Outer and 2nd at Thane...both would take 20-25 mins collectively....... Thats the reason for further slowing in LTT-KYN Section.
KYN-KSRA Section: It is impossible for a train to cover this stretch in 1 hr. Further adding 10 mins to this stretch would be good
there needs to be a tech halt at KSRA...
more... for 2-5 mins for attaching Bankers.
KSRA-IGP Section would take 30 odd mins due to the Ghat Section.
.
hope this makes my Red for below time table clear.