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.^[3] 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.^[3][4]

IR runs more than 13,000 passenger trains daily, on both long-distance and suburban routes, from 7,349 stations across India.^[3] 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).^[5] 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).^[6]

As of March 2017, IR's rolling stock consisted of 277,987 freight wagons, 70,937 passenger coaches and 11,452 locomotives.^[3] 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.^[3]

In the year ending March 2018, IR is projected to carry 8.26 billion passengers and transport 1.16 billion tons of freight.^[2] In the fiscal year 2017-18, IR is projected to have earnings of ₹1.874 trillion (US$29 billion), consisting of ₹1.175 trillion (US$18 billion) in freight revenue and ₹501.25 billion (US$7.7 billion) in passenger revenue, with an operating ratio of 96.0 percent.^[2]