Indian Railways is the primary mode of transportation in India, serving over 1 billion people across 40,000 miles of track divided into 17 zones. It is one of the largest rail networks in the world and has made technological improvements like developing an online reservation portal that now sees 19 million visitors booking tickets annually in a simplified, user-friendly system. Indian Railways also launched new fast train lines that eased passenger traffic and introduced metro systems to further improve transportation across the country.