On 01.01.1972, Pallavan Transport Corporation was established under Companies Act,1956 and buses operated in
Chennai and Chengalpattu were brought under it and paved way for inception of other State Transport Undertakings
Originally, 21 STUs were created by bifurcation from 1972 to 1996 and merging
of STUs started in 2001, and the total STUs presently functioning are Eight.
State Transport Undertakings
- Metropolitan Transport Corporation Limited
- State Express Transport Corporation Limited
- Tamilnadu State Transport Corporation(Villupuram) Limited
- Tamilnadu State Transport Corporation(Kumbakonam) Limited
- Tamilnadu State Transport Corporation(Salem) Limited
- Tamilnadu State Transport Corporation(Coimbatore) Limited
- Tamilnadu State Transport Corporation(Madurai) Limited
- Tamilnadu State Transport Corporation(Tirunelveli) Limited