How have Indian Railways evolved, and what is their current importance to the nation?

Indian Railways have evolved significantly since their introduction by the British in eighteen fifty-three. Today, it is the fourth-largest railway system in the world, carrying over twenty million passengers every day. It offers one of the cheapest train services globally. Cargo trains carry coal, grains, textiles, and electronics using seventy-five to ninety per cent less energy than road transport. India is aiming to have one hundred per cent trains running on electricity by twenty twenty-five, which is better for the environment.