The Barauni–Guwahati railway line connects Barauni, Saharsa, Purnia and Katihar in the Indian state of Bihar and Bongaigaon, Kamakhya and Guwahati in Assam via Siliguri, Jalpaiguri, Cooch Behar and Alipurduar in West Bengal. It is a linkage of prime importance for Northeastern India with Capital of india.

Purnea Junction railway station, is the railway station serving the city of Purnea in the Purnea district in the Indian state of Bihar. It is a A category railway station of Katihar railway division in Northeast Frontier Railway.