Humsafar trains are long distance superfast trains that traverses overnight journeys. This is a new concept by the Indian Railways. Some Humsafar trains also run for more than 24 hours. Keeping in mind the middle class travellers, Humsafar was launched last year by the Former Railway Minister Mr. Suresh Prabhu. It has only Third AC class coach and have optional meal service. This train follows dynamic pricing meaning fare increases as the seat availability decreases. However, these trains hold lesser priority than Rajdhani and Shatabdi trains. Humsafar trains are equipped with modern day amenities and enhanced safety features. There are CCTV cameras fitted in every coach of Humsafar trains and there are charging points for each berth. One can also see current running speed of train on the LEDs fitted above doors. These trains are characterized by beautiful graffiti paint with vibrant sky blue color on outer surface of coaches. 1 humsafar train runs from Sambalpur to Nagpur - HUMSAFAR EXP (20918).

Sambalpur to Nagpur HUMSAFAR EXP (20918) departs from Sambalpur City station (SBPY) at 06:35 and arrives Nagpur station (NGP) at 18:30. Sambalpur to Nagpur humsafar fare is Rs.1135 in Third AC, Rs.420 in Sleeper and Rs.245 in Second Seater for this train.