I have compiled the list of Maximum Speed of locomotives (permissible mechanically and operational aspect) from WR working TT. Hope it helps.
1: Maximum Permissible Speed from Mechanical point of view
2: Maximum Permissible Speed from Operating point of view
5: Mainline Goods
6: Mainline Passenger
7: 105 km/hr VR SAH (Saphale)
8: 100 km/hr VR BL; 105 km/hr BL ADI
9: 120 km/hr VR BRC
10: 100 km/hr BCT VR
11: SAH BH
12: VR GDA (Godhra)
13: Actual operational speed varies between 50 - 75 km/hr on most sections between CCG and VR. On CR, max. operational speed is limited to 80 km/hr.