Well... as per a few online news items the conversion work by ECR is going on in full swing so that the present MPS of 110 Kmph for all trains can be raised. Some places like Kiul, Jha Jha and Buxar are under the hammer. The Railway Board hasn't sanctioned funds for laying a 3rd line between Mughalsarai and Patna via Buxar yet... clearance awaited by ECR ;-)