With extension of Thiruvananthapuram-Kasaragod VB(orange) up to Mangaluru, a spare rake of VB will be freed up and I believe, there are maximum possibilities that the spare rake might be utilised for introduction of new VB for Kerala region.
Note: Few days before CBE MLA requested revision in TT for CBE-BNC VB and introduction of new VB between Thiruvananthapuram and Coimbatore.
First one done, what do you think about second one?