National Highway 31 (NH 31), previously known as National Highway 106, is a national highway of India. It starts from Birpur in Supaul district to Bihpur in Bhagalpur district and passes through Madhepura district and terminates at Bihpur in Bhagalpur district of Bihar. It is major Highway of Madhepura district which starts at Birpur, passes through Simrahi, connects National Highway 57, Singheshwar, Madhepura junction to National Highway 231 (previously known National Highway 107), Reshna, Gwalpara, Udakisunganj, and terminates at Bihpur connects National Highway 31.[1]
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 Map of National Highway 131 in red | ||||
| Route information | ||||
| Length | 132 km (82 mi) | |||
| Major junctions | ||||
| South End end | Bihpur | |||
| North End end | Birpur | |||
| Location | ||||
| Country | India | |||
| States | Bihar | |||
| Primary destinations |
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| Highway system | ||||
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Route
Bihpur, Puraini, Udakishanganj, Reshna Madhepura, Singheswar Sthan, Pipra, Simrahi Bazar, Bhimnagar, Birpur
