The Assam Mail was one of the better known metre-gauge trains in the Indian Railways system that was there from the pre-independence days.

[1] After independence and partition of India in 1947, the train travel to Assam stopped temporarily (possibly till 1950).

[1] The metre gauge part of the Assam Mail from Barauni to Dibrugarh covered 1,369 kilometres (851 mi).

[2] In 1986, when the Barauni–Guwahati line was converted into broad gauge the Assam Mail was renamed as the North East Express.

[1] The new Superfast train North East Express was introduced via Kanpur, Patna, Barauni, Kishanganj, Fakiragram Junction, covering 1,890 kilometres (1,170 mi) between New Delhi & Guwahati in 33 hrs 15 mins at speed of 57 kilometres per hour (35 mph).