The sanctioned stretch runs from Muzaffarpur through Sitamarhi to Sonbarsa on the India-Nepal border, and functions as a feeder corridor to NH-27, the East-West Corridor. The design deliberately avoids at-grade median openings so that traffic runs uninterrupted, which is why the corridor can be operated at a 100 kmph design speed. Seven major bridges are planned, the largest a 340-metre span over the Bagmati, a perennial river associated with the flood-prone plains of north Bihar. Three railway overbridges and two flyovers, of 1,170 metres and 270 metres, complete the structural package. The route covers five economic nodes, four industrial estates and one mega food park, and passes near the Baba Garibnath Temple, the Mata Janki and Janaki Punaura Dham temples and points on the Buddhist Circuit.