The trains have a five-digit numbering system. Indian Railways ran on average 13,313 passenger trains daily in 2015-16.
IR operates both long distance and suburban rail systems. All the electrified lines use 25 kV AC electric traction. Small stretches of the network use metre and narrow gauges. It is the fourth largest railway network in the world comprising 119,630 kilometres (74,330 mi) of total track and 92,081 km (57,216 mi) of running track over a route of 66,687 km (41,437 mi) with 7,216 stations at the end of 2015-16. In 2015-16, IR carried 8.107 billion passengers annually or more than 22 million passengers a day and 1.101 billion tons of freight annually.As of the end of 2015-16, of the total 68,525 km (42,579 mi) route length, 28,327 km (17,602 mi) or 45% were electrified and 28,371 km (17,629 mi) or 37% were double or multiple line routes. The railway network is predominantly a broad gauge network.
It is owned and operated by the Government of India through the Ministry of Railways. Indian Railways (reporting mark IR ) is a State owned national transporter, responsible for rail transport in India.
