Tamil Nadu has a highly developed transportation network. The state is crisscrossed by an extensive system of well-maintained National and State Highways. Public road transport is robust, managed by the state-run TNSTC and SETC, while city transit is handled by local bodies like the Metropolitan Transport Corporation (MTC) in Chennai.
The railway network is operated by the Southern Railway zone (headquartered in Chennai), connecting even remote towns. Tamil Nadu is uniquely served by four international airports: Chennai (MAA), Coimbatore (CJB), Madurai (IXM), and Tiruchirappalli (TRZ), alongside domestic airports in Salem and Thoothukudi. Maritime trade is supported by three major seaports—Chennai Port, Kamarajar Port (Ennore), and V.O. Chidambaranar Port (Thoothukudi). Urban transit includes the rapidly expanding Chennai Metro and extensive suburban rail systems.