National Highway 31 is an important
National Highway in
India. It provides a gateway to the states of
North-East India. The highway is long. It starts in
Barhi,
Jharkhand at the
NH 2 and generally trends to the northeast, passing through
Jhumri Tilaiya,
Koderma,
Nawada,
Bihar Sharif,
Harnaut,
Bakhtiarpur,
Mokameh,
Begusarai,
Purnea,
Dalkhola,
Kishanganj,
Bagdogra,
Siliguri,
Malbazar,
Mainaguri,
Dhupguri,
Cooch Behar,
Tufanganj,
Kokrajhar, and
Nalbari before ending at
Jalukbari,
Guwahati.