Southern Railway zone of Indian Railways operates all railway lines in the state connecting most major towns and cities except those in the highland districts of Idukki and Wayanad.[20] The railway network in the state is controlled by two out of six divisions of the Southern Railway; Thiruvananthapuram Railway division and Palakkad Railway Division.[21] Thiruvananthapuram Central (TVC) is the busiest railway station in the state.[22] Kerala's major railway stations are: