[3] It caters to all the districts within Tamil Nadu and also operates services to neighbouring states of Andhra Pradesh, Karnataka, Kerala and union territory of Puducherry.

TNSTC along with its subsidiaries, owns 321 depots and five workshops with a combined fleet strength of 21,678 buses.

It has also been suggested by the planning commission that the railways should participate or contribute to the state governments for running all the nationalised road services only when they decide to set up a corporation.

The Maravars opposed the naming of the new corporation on Veeran Sundaralingam, who is supposedly believed from the Devendrakula Velalar community.

In 2013, Tamil Nadu State Transport Corporation Limited established Amma Kudineer (Amma packaged drinking water) which is involved in the production and packaging of mineral water in one-litre plastic bottles, and selling them in long-distance running state-owned buses and in bus stations.