Indian Railways is over 150 years old and is the largest rail network in the world under one management. It plays a crucial role in India's economic development by transporting raw materials and goods across the country in a convenient and efficient manner. Recent initiatives by Indian Railways include increasing private participation through public-private partnerships and improving passenger amenities and sanitation. Freight transportation makes up 70% of Indian Railways' revenue and it carries a wide variety of goods using different types of freight trains.