Agartala–SMVT Bengaluru Humsafar Express

The 12504/12503 Agartala–SMVT Bengaluru 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 Sir M. Visvesvaraya Terminal, Bengaluru, the capital city of Karnataka and Agartala railway station, Agartala, 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 coach 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.


 * 16 AC III Tier
 * 1 Pantry car
 * 2 Generator Power Car

Stoppages
Also there is demand that Eluru and Nellore railway stations to be provided with halt at these stations. As of 2022, the train has technical halt at West Bengal's New Cooch Behar railway station railway station, for changing of Locomotive.

Loco links
This train is hauled by an Electric Loco Shed, Royapuram-based WAP-7 or Electric Loco Shed, Erode-based WAP-7 locomotive from Sir M. Visvesvaraya Terminal to Visakhapatnam. Then from Visakhapatnam to New Cooch Behar it is hauled by a WAP-7 locomotive of Electric Loco Shed, Howrah. And then from New Cooch Behar to Agartala it is hauled by WDP-4D locomotive of Diesel Loco Shed, Siliguri.

Service
It averages 65 km/h as 12503 Humsafar Express starts on Tuesday and covers 3529 km in 64 hrs 35 mins and it averages 66 km/h as 12504 Humsafar Express starts on Saturday and covers 3529 km in 62 hrs 20mins.