What's the double game they are playing? What do they achieve by not letting ECoR extend the train to SBC (I think extending it to SBC is not a good proposal, but that's a different thing).
SCR gets more than 85% of the revenue from every end-to-end booking on Tirumala now, irrespective of which zone is maintaining the train. If it gets extended to SBC, they'll still get ~70% of the revenue from every VSKP-SBC booking. If anything, it is actually beneficial for them if it is extended to SBC, as they...
more... will get more revenue without having to do anything for the rake or even making their loco allotment easier.
The extension to HX is nothing but a political stunt to boast that they've given connectivity between HX area and BZA/VSKP. It was proposed many times in the past, but was rejected. But after bifurcation, it became more important and therefore, more political pressure?