Humsafar Express is a fully premium service with AC-3 Tier and Sleeper class accommodation having all the modern facilities designed and operated by Indian Railways.
"Humsafar" is an Urdu word meaning "co-passenger"
The first service was inaugurated on 16 December 2016 between Gorakhpur and New Delhi.
Longest service agartala bng
https://en.wikipedia.org/wiki/Agartala%E2%80%93SMVT_Bengaluru_Humsafar_Express