The train runs the first route, Grand Chord via Gaya, from Monday through Saturday (from Howrah), and the second route, Howrah-Delhi main line via Patna, on Friday.
This was a natural choice, due to the rail link between Gaya and Varanasi, both on the Grand Chord section of the Indian Railways.
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A separate Ranchi Rajdhani (Train no. 12439/12440) via Grand Chord route is also there via Bokaro, Gomoh, Gaya.