[2] NH-179A traverses the state of Tamil Nadu in India.

[3][4] Salem, Harur, Uthangarai, Thirupathur, Vaniyambadi.

[1][3] Four laning of national highway 179A has been taken up along stretch from Harur to Vaniyambadi.

[5] Salem to Harur stretch is part of Chennai - Salem greenfield highway project which is also part of Bharatmala Pariyojana scheme.

[6] Chennai-Salem Greenfield Corridor under the Bharatmala Pariyojana, a centrally-sponsored and funded road and highways project, is a 277.30 km highway that involves the development of the Tambaram to Harur Section of NH-179B, Harur to Salem Section of NH-179A, Chengalpattu to Kancheepuram Section of NH-132B, Semmampadi to Chetpet Section of NH-179D and Polur to Tiruvannamalai Section of NH-38.