[1][2] The train passes through Jharkhand, Bihar, West Bengal and Assam.
The 15661/Ranchi–Kamakhya Express has an average speed of 44 km/h and covers 1191 km in 27 hrs.
15662/Kamakhya–Ranchi Express has an average speed of 45 km/h and covers 1191 km in 26 hrs 25 mins.
Ranchi Kamakhya Express is hauled by an Asansol Electric Loco Shed-based WAG-5/WAP-4 or Howrah Electric Loco Shed-based WAP-4 from Ranchi to New Jalpaiguri, From New Jalpaiguri to Kamakhya the train is hauled by Siliguri Diesel Loco Shed-based WDM-3A/WDP-4D/WDP-4 Locomotive .
The train consists of 22 coaches: The train doesn't have Pantry Car Coach, but On board Catering services and E-Catering Services are available.