PUNE-Mumbai & PUNE-Satara is dence Ghat Zone. Miraj-KOP low MPS Section, train dont cross 60 there!!
Train make up time in-between:
1. CSTM/DR/LTT-KYN-Karjat
2. Lonavala-Pune
3. Some 50 Kms towards Satara from PUNE
4....
more... Karad-Miraj
If these section werent fast, then train's avg would have been 35-40 KMPH!!