Tamil Nadu State Transport Corporation transport corporation in India also biggest corporation in the world after bifurcation of APSRTC. TNSTC operates buses of various classes to cater to different sections of public: TNSTC and SETC use custom made buses built on Ashok Leyland and TATA supplied chassis. Air conditioned buses for intra city routes in Chennai are supplied by Volvo. All divisions have individual own coach building units. In 1984, Tamil Nadu State Transport Corporation Limited established Institute of Road and Transport Technology at Chithode, Erode and IRT Perundurai Medical College at Perundurai near Erode. In 2013, Tamil Nadu State Transport Corporation Limited established Amma
History of Tamil Nadu in the Indian Union, Tamil Nadu was the seventh largest economy in 2005 among the states of India. The growing demands for skilled labour has caused increased number of educational institutions in Tamil Nadu. The widespread application of caste based affirmative action caused the state to have 69% of all educational and employment vacancies to be reserved to the backward castes. Such caste-based reservations have huge public support in Tamil Nadu, with no popular protests organised against its implementation. The politics of Tamil Nadu have gone through three distinct phases since independence. The domination of the Congress Party after 1947