04hrs 20 minutes from MAS to SBC by 12007 is really awesome..
So it is capable of covering the stretch in less than 4.5 hrs.
Than wasting money for developing a bullet train corridor between Chennai and Bangalore (Which will definitely takes decades of decades to complete)
It is better to concentrate on current route and availability like
-->increase...
more... in mps between MAS and SBC to at least 140+ KM/Hr,
-->Making a JTJ bye pass route on the eastern side of JTJ which connects the SBC track and MAS track(so that the train passes towards SBC without touching JTJ station),
-->Compleating the the 4 line corridor between MAS and AJJ ASAP,
-->Making proper arrangements in all intermediate junction s like AJJ, KPD, BWT so that train can cross the station atleast with an MPS of 65 to 70 + KM/Hr(I think KPD already has this facility),
-->Providing WAP5 to these trains (both 12007/12008 and 12027/12028)
I am confident that the MAS-SBC stretch can be covered in 4 hours by these trains.