No one is talking about worlds 4th largest railway network that is Indian Railways which is about 68,000 kilometers in length.. Indian railways is one of the oldest railways in the world established back in 1700s by British Railways.Almost 85% electrified tracks is running one of the powerful locos in the world Tonnes of freights every day. it is the the backbone of the largest growing economy in the world.Its daily turnover is 26 Billion dollars. You can checkout few glimpses of it :www.youtube.com/watch?v=1R28mDrNLTQ.