National railways are government-owned train systems that provide transportation services across a country. They are responsible for operating passenger and freight trains, connecting cities and regions, and facilitating trade and travel. National railways often play a crucial role in a country's infrastructure and economy. These rail systems typically include a network of tracks, stations, and maintenance facilities. They may also collaborate with private companies for certain services. Examples of national railways include Amtrak in the United States and Indian Railways in India, both of which serve millions of passengers each year.