South Indian Railway Company
The South Indian Railway Company operated a number of gauge lines in South India from 1874 to 1951. History. The Great Southern of India Railway Company was established with its headquarters in England in 1853. The Carnatic Railway Company was founded in 1869. The two companies merged in 1874 to form the South Indian Railway Company. The new firm was registered in London in 1890 with Trichinopoly as its headquarters. In 1891, the Pondicherry Railway Company (incorporated in 1845) merged with the South Indian Railway Company. The company moved its headquarters later to, Chennai Central. The  company operated a suburban electric train service for Madras city from May 1931 onwards. The South Indian Railway Company was nationalized in 1944. On 1 April 1951, the South Indian Railway Company, the Madras and Southern Mahratta Railway Company and the Mysore Railway Company were merged to form the Southern Railway zone of the Indian Railways. Conversion to broad gauge. The railway lines were converted to broad gauge in the 1990s.