The Indian Railways is divided into zones, which are further sub-divided into divisions, each having a divisional headquarters. There are a total of 73 divisions.
Each of the divisions is headed by a Divisional Railway Manager (DRM), who reports to the General Manager (GM) of the zone. A DRM can be appointed from any services of Indian Railway, Indian Railway Traffic Service (IRTS), IRAS ,IES , IRPS etc.for the tenure of 3 years but it can be exceeded on the recommendation of Railway Board. Divisional officers heading all departments viz. engineering, mechanical, electrical, signal and telecommunication, accounts, personnel, operating, commercial, safety, medical, security branches report to the Divisional Railway Manager. The DRM is assisted by one or two Additional Divisional Railway Managers (ADRM) in the working of the division.
The 17 zones and the 69 divisions are listed below:
A typical division has an average track length of about 1,000 km (620 mi) and staff strength of about 15,000. All the departments and services of the Indian Railways are represented in a Division.
Every division has a Control Room for train operations, from where all the trains in the division are controlled and monitored.
Every division has Accident Relief Trains (ARTs), Accident Relief Medical Vans (ARMVs) and Breakdown Cranes for assisting in disaster management. These are under the supervision of the SrDME of the Division, who is also the head of Disaster Management of the Division.
The Diesel Locomotive Sheds and Electric Locomotive Sheds on the division maintain diesel and electric locomotives respectively. Their administrative control is with the DRM.
Every division has some coaching depots to maintain its passenger cars and sick lines to maintain freight cars which are found unfit at the freight examination points.