Shamlimar-Patna Duronto follows ACC Link Line via Bhattnagar to join ER HWH-BWN Chord Line from SER Shalimar Side to go to Patna.
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There is already a train between Sealdah & Udaipur via BWN-PNBE so this new train between Shalimar & Udaipur has been given a New Longer Route to connect a new set of cities en route :-)