Indian Railways (IR) is India's national railway system operated by the Ministry of Railways. It manages the fourth-largest railway network in the world by size, with 121,407 kilometres (75,439 mi) of total track over a 67,368-kilometre (41,861 mi) route. Forty nine percent of the routes are electrified with 25 KV AC electric traction while thirty three percent of them are double or multi-tracked.
IR runs more than 20,000 passenger trains daily, on both long-distance and suburban routes, from 7,349 stations across India. The trains have a five-digit numbering system. Mail or express trains, the most common types, run at an average speed of 50.6 kilometres per hour (31.4 mph). In the freight segment, IR runs more than 9,200 trains daily. The average speed of freight trains is around 24 kilometres per hour (15 mph).
As of March 2017, IR's rolling stock consisted of 277,987 freight wagons, 70,937 passenger coaches and 11,452 locomotives. IR owns locomotive and coach-production facilities at several locations in India. The world's eighth-largest employer, it had 1.308 million employees as of March 2017.
In the year ending March 2018, IR carried 8.26 billion passengers and transported 1.16 billion tonnes of freight. In the fiscal year 2017-18, IR is projected to have revenue of ₹1.874 trillion (US$26 billion), consisting of ₹1.175 trillion (US$16 billion) in freight revenue and ₹501.25 billion (US$7.0 billion) in passenger revenue, with an operating ratio of 96.0 percent.