Circular rail, if implemented properly can work in Lucknow[and won't suffer the same fate as Delhi's Ring Railway]. It would be curious as to how they will implement the Gatimaan services from Lucknow. The GKP bound tracks are fit for 120 now[nearly] but demand is a problem there; the BE bound tracks aren't great either plus demand is an issue again. The route going towards CNB has huge demand[linking Lucknow and Kanpur to Agra in the future with Agra might be possible] but that would require a revamp of the LJN-CNB route which is full of speed restrictions.