Bangalore Cantonment–Agartala Humsafar Express
Bangalore Cantonment–Agartala Humsafar Express is the longest-running Humsafar Express and 7th longest train service of Indian Railways, It is a fully air conditioned express train, connecting Bangalore Cantonment, the capital city of Karnataka and , the capital city of Tripura . It is currently being operated with 12503/12504 train numbers on a weekly basis. The train runs through states of Karnataka, Tamil Nadu, Andhra Pradesh, Odisha, West Bengal, Bihar, Assam and Tripura. On its journey the train also touches some parts of Jharkhand in Pakur district but does not have the stoppage there. Coach composition . The trains is completely 3-tier AC LHB coaches designed by Indian Railways with features of LED screen display to show information about stations, train speed etc. and have announcement system as well as, Vending machines for tea, coffee and milk, Fitted with bio toilets in compartments as well as CCTV cameras. This train consists of sixteen AC III Tier coaches, one Pantry car and two Generator Power Car coaches. Stoppages. Also there is demand that Eluru and Nellore railway stations to be provided with halt at these stations. Loco links. This train is hauled by a Lallaguda-based WAP-7  or Vijayawada-based WAP-4 locomotive from Bangalore Cantonment to . Then from Visakhapatnam to it is hauled by a WAP-4 locomotive of Santragachi shed. And then from Malda Town to Agartala it is hauled by based WDP-4D locomotive. Service. It averages 65 km/hr as 12503 Humsafar Express starts on Tuesday and covers 3534 km in 64 hrs 35 mins & it averages 66 km/hr as 12504 Humsafar Express starts on Saturday and covers 3534 km in 62 hrs 20mins.