National Highway 210 is a National Highway in Southern India entirely within the state of Tamil Nadu. NH 210 runs from Trichy to Ramanathapuram in Tamil Nadu. Municipal office road in Trichy becomes NH 210 which on its way south east crosses the major towns Pudukottai and Karaikkudi and finally joins East Coast Road at Devipattinam in Ramanathapuram district. This highway connects with the Trichy International Airport. Four lane construction work is under progress from Trichy to Karaikkudi. This project executed by Transstroy Ltd OJSC Consortium, an Indo-Russian venture under build, operate, transfer (annuity) scheme entails construction of bypass roads at Keeranur, Pudukottai, Tirumayam and Karaikkudi.
Trichy, Keeranur, Pudukottai, Thirumayam, Kanadukathan, Karaikkudi, Devakottai, Tiruvadanai, R.S.Mangalam and finally joining the East Coast Road(ECR) at Devipattinam.