I dont agree curves as reason. SBC MYS section also has curves similar to be found in TVC KYJ section. KYJ KTYM ERN is too much curvy. TCR side we have some issues. MPS less is good reason. Infrastructure not there also need to consider. Fully Inside Kerala is tough to run. we dont have sections 600+ inside KL except kasargod to TVC. Even TVC CAN comes to 500 comparable to MS MDU/ MAS CBE. Ernakulam and kozhikode has premium crowd but too short for a premium train to run. PGT CBE has Elephant corridor issue. PUU SCT is ghat section. When we consider TN KL KA sections as whole technically MDU TVC VB is possible but there is no demand for it like MDU MS/ MDU SBC parts. Another possible VB is SA CAN giving extra slack in PGT CBE section. MAQ CBE is also good possible one which already...
more... agreed upon. . I can still say TEN GUV VB (considering MPS limitations ) also can be tried via NJT TVC QLN ALLP ERS TCR as there is no fast trains there once 110 Speed up is implemented which takes time.